50 points!!

Which is true about cell membranes?


Cell membranes consist of a single layer of phospholipids.


Cell membranes are made of lipids and carbohydrates.


Cell membranes are rigid and protect the cell.


Cell membranes form barriers around the cell.

Answers

Answer 1

Answer:

Part of the cell membrane is a phospholipid bilayer,

Explanation:

Cell membranes are composed of proteins and lipids. Since they are made up of mostly lipids, only certain substances can move through. Phospholipids are the most abundant type of lipid found in the membrane. Phospholipids are made up of two layers, the outer and inner layers., made of two layers of phospholipid molecules. However, the cell membrane also contains other macromolecules like membrane proteins, and carbohydrates. Therefore, we can say that the cell membrane is made of a phospholipid bilayer, but it is not only made of it.


Related Questions

why do the Earth's processes work in an endless cycle and not a linear process?​

Answers

Earth's processes work in an endless cycle and not a linear process in order to ensure that matter is neither lost nor created.

Why do Earth's processes work in a cycle?

Earth's processes refer to the various processes that occur on the earth that enable the sustenance of the materials present on earth.

Some examples of Earth's processes include the following processes:

Water cycleCarbon cycle Nitrogen cycle

These processes occur in cycles such that the materials present in each process are recycled.

The law of conservation of matter states that matter can neither be created nor destroyed.

Hence, the earth's processes occur in a cycle to ensure that matter is not lost.

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make a claim that answers the scientific questions, how effective is Kernza at reducing the amount of nitrate in the soil water? And, is it equally effective over time

Answers

The reduction of the amount of nitrate in soil water proposed by Kernza is very effective, because nitrate dissolves well in water. This one helps to facilitate the use of the plants, but can also end up in rivers and groundwater.

Underground water with only 10 milligrams of nitrate per liter is not safe drinking because it can lead to greater risk of cancer and birth defects. That is very expensive to remove nitrate from drinking water. Cities whose groundwater is contaminated must pay to have it removed or to find a new source of drinking water. Virtually all nitrate pollution comes from fertilizers used on crops so a way to deal with it problem is changing the way we farm.

Wha is the Kernza reducing?

Evelyn is one of these researchers. She grew up in Minneapolis, Minnesota and as a high school student, she was surprised to learn that agriculture has a huge impact on soil and water quality, wildlife habitat, and biodiversity. She wanted to help protect the environment, so she studied Food Systems at the University of Minnesota.

A few years later, she joined a project that involved planting Kernza in rural areas to prevent and reduce nitrate contamination of drinking water. Farmers, city officials, water managers, and scientists worked together to find solutions. This project inspired Evelyn to study Kernza and nitrate for her master’s degree.

To see if Kernza helped absorb more nitrate from soil than annual crops, Evelyn and her colleagues ran an experiment. They planted plots of Kernza and other plots that rotated between corn and soybean every year. Plots with Kernza and corn were fertilized with nitrogen. Soybean plots were not fertilized.

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Describe how lymph nodes, bone marrow, and
the spleen help fight off various illnesses.

Answers

Answer:

Explanation:

Lymph vessels send lymph fluid through nodes throughout the body. Lymph nodes are small structures that work as filters for foreign substances, such as cancer cells and infections. They contain immune cells that can help fight infection by attacking and destroying germs that are carried in through the lymph fluid.The tissues and organs that produce, store, and carry white blood cells that fight infections and other diseases. This system includes the bone marrow, spleen, thymus, lymph nodes, and lymphatic vessels (a network of thin tubes that carry lymph and white blood cells)

the aspect of personal health that is most within your control is multiple choice human biology. lifestyle. genetic inheritance. environment.

Answers

Your lifestyle has the largest influence over your own health.

A little essay about health

A health essay Earlier, it was said that being healthy meant having a healthy physique. But as time passed, so did our understanding of what constitutes health. Health is the most important thing, and everything else follows, as cannot be emphasized enough. Everything else falls into place as long as you keep your health.

What does a healthy life entail?

Real health is more than just eating well and exercising; it also entails managing stress, getting adequate sleep, being attentive, being physically and mentally fit, interacting with others, and more.

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fill in the blank
the high level of lactic acid in blood is a sign that __ as occured​

Answers

Answer:

fermentation

Explanation:

More precisely, lactic acid fermentation has occurred.

Hope it helps!

beginning in anatomical position, what movements of the forearm are involved in bending your elbow and then turning your forearm so that your palm faces the floor?

Answers

The forearm movements that alternate between these two positions are called supination and pronation. The motion that changes the forearm's anatomically correct supinated position to the pronated (palm backward) position is known as pronation.

How does bending your elbow entail motions of the forearm?

Elbow flexion is the process by which your forearm moves toward your body by bending at the elbow. Elbow extension refers to the inverse motion. The following three bones work together to flex the elbow: Your upper arm's humerus

Is that what you end up in when you turn your forearm such that your palm is towards the ground?

Pronation: A forearm rotation in which the palm turns from being anteriorly facing to being posteriorly facing, or palm down.

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What kinds of resources make up your ecological
footprint?

Answers

Answer:

Food, shelter, transportation, goods, services, and many others.

Explanation:

A species that has a large effect on the types and abundance of other species in an ecosystem

Answers

A species that plays a vital role in defining an ecosystem is known as a keystone species.Without its keystone species, a ecosystem would either no longer exist or would change significantly.

What kind of animal has the biggest impact on an ecosystem?

a species that significantly affects the types and numbers of other species in an ecosystem. A keystone species is one that has an outsized impact on its habitat compared to its abundance.

How many species are there in an ecosystem, and where are they located?

In ecological systems, the whole distribution of rarity and commonness is described by the species abundance distribution (SAD).It has a stable shape with several rare species and few abundant species coexisting in a community, making it one of the most fundamental and pervasive patterns in ecology.

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it is normal for a student’s heart to beat fast during and after strenuous exercise.

Answers

yes, it is normal for a student’s heart to beat fast during and after strenuous exercise.

When we exercise, our muscles need oxygen carried by the bloodstream. The function of the lungs is to supply oxygen to the blood that is carried throughout the body. So when the body needs more oxygen (such as during exercise), the lungs and heart have to work faster, thus accelerating the cardiopulmonary system.

This measurement is taken after strenuous exercise, so allow your heart rate to recover until it returns to normal.

therefore, it's a normal thing or a student’s heart to beat fast during and after strenuous exercise.

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A genetic reult from the of a acid in a trand of DNA. Thee change can have no effect on the organim, or it can have reult. One caue of mutation reult when the cell place the wrong nucleic acid on the DNA trand, which i known a a error. Other mutation can be caued when a inject it DNA into the cell. Another caue of genetic mutation come from , which wa reponible for the health effect following the diater

Answers

Numerous defense systems exist in cells to stop mutations, or long-lasting alterations in DNA sequence.

Numerous defense systems exist in cells to stop mutations, or long-lasting alterations in DNA sequence. Most DNA polymerases "check their work" during DNA synthesis, correcting the majority of mis paired bases in a procedure known as proofreading. Any mismatched bases that are still present after DNA synthesis can be found and fixed through a procedure known as mismatch repair.

Different processes, such as chemical reversal, excision repair, and double-strand break repair, can be used to fix damaged DNA.

In fact, replication mistakes and DNA damage occur often in the cells of our bodies. However, they typically don't result in cancer or even mutations. That's because DNA repair and proofreading systems typically identify them and fix them. The cell will also go through programmed cell death (apoptosis), which prevents the flawed DNA from being passed on, if the damage cannot be repaired.

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What term is used for the muscles and glands whose activities are controlled by nervous activity?

Answers

The term is effectors

Based on the experimental results, which of the following describes the most likely defect in muscle cells of patients with type 2 diabetes?

Answers

Answer:

Skeletal Muscle Insulin Resistance Is the Primary Defect in Type 2 Diabetes.

Explanation:

Answer: Insulin does not activate its receptor.

Explanation: Type II Diabetes is vaguely a desensitization of insulin receptors to insulin, and it is shown in the first graph where glucose transport in the diabetic muscle cells is much lower than that of the control group.

The diagram below depicts a prokaryotic cell and a eukaryotic cell during the cellular division in which of the following ways does this differ in prokaryotic and eukaryotic cells

Answers

The difference between eukaryotic cells and prokaryotic cells is that eukaryotic cells can undergo meiosis, and prokaryotic cells cannot.

What are eukaryotic cells and prokaryotic cells?

Eukaryotic cells are cells that have a well-defined membrane-bound nucleus as well as other membrane-bound cellular organelles.

Prokaryotic cells are cells that do not have a well-defined membrane-bound nucleus as well as other membrane-bound cellular organelles.

Eukaryotic cells and prokaryotic cells both undergo cell division.

However, cell division in eukaryotic cells involves both meiosis and mitosis.

Prokaryotic cells on the other hand only involve only mitosis.

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After an mrna molecule is constructed from a dna template, which two statements explain what happens next?
A) The mRNA becomes a double stranded molecule.B) The mRNA brings an amino acid to the nucleus.C) The mRNA contains a start codon that reads AUG.D) The mRNA travels from the nucleus to the ribosome.

Answers

The translation process begins at a ribosome in the cytoplasm after the mRNA molecule exits the nucleus.

What transpires to mRNA when the strand is finished?

The mRNA molecule detaches from the DNA template following termination. At this stage, the freshly generated mRNA goes through a process in which non-coding nucleotide regions, known as introns, are cut off of the mRNA strand, at least in eukaryotes.

What transpires after mRNA leaves the nucleus?

mRNA travels to a ribosome, which is composed of proteins and rRNA, after leaving the nucleus. Translation occurs on ribosomes that are either attached to the rough endoplasmic reticulum or are floating in the cytoplasm.

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a bacterial cultures has an initial population of 10000. if its population declines to 6000 in 4 hours, what will it be at the end of 6 hours

Answers

After 10 hours, the bacteria's population will have decreased to roughly 27.

Detailed explanation:

use the equation P = Iekt.

The equation becomes 10,000 = Iek if the starting population of the bacterial culture is 10,000. (0)

with I = 1 and t = 0 10000

P = 4000 and t = 4 hours if its population drops to 6000 in that amount of time.

As a result, 6000 = Ie4k... 2

We assume the natural logarithm of both sides in equation 2 to be;

I lne4k = ln6000

I k = ln6000/4I k = ln6000/4I = ln6000 (10000) I equals 10000 k = ln6000/40000 k = 4/40000 k = 0.0001 because.

Since P = Iekt, the population will be as follows after 10 hours.

I=10,000 k=0.0001, and t=10

P = 10000e^(0.0001×10)

P = 10000e^0.001

P = 10000×0.0027

P = 2

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What is similar and different about the nitrogen, phosphorus, and carbon cycle?

Answers

Answer:

Both carbon and nitrogen cycle are types of biogeochemical cycles and tend to liberate elements from their cycles.

Explanation:

Both carbon and nitrogen cycle are types of biogeochemical cycles and tend to liberate elements from their cycles. The carbon cycle releases carbon, and the nitrogen cycle releases nitrogen into the atmosphere. 2. In both cycles, the process starts with gas and also ends in a gaseous state.

Compared with people in developing countries, people in industrialized countries are more likely to eat.

Answers

As compared to the people living in developing countries, the people which live in industrialized countries are much likely to eat beef.

The world’s livestock sector is expanding at an uncommon rate and the reason behind this giant leap is a combination of growth in population, increasing incomes as well as urbanization. Annual meat production is expected to rise from 218 million tons in 1997-1999 to 376 million tons by the year 2030.

There is a powerful positive relationship between the level of income and the intake of animal protein. People living in industrialized countries are more likely to consume beef as compared to those who are living in  developing countries.

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Which are functions of the microfilaments?
Choose all that apply:

cell movement


helping to "walk" proteins through the cell


maintaining cell shape

pulling chromosomes apart during cell division

anchors organelles


completion of cell division

Answers

The functions of microfilaments are as follows:

pulling chromosomes apart during cell division (option D)maintaining cell shape (option C)cell movement (option A)

What are microfilaments?

Microfilaments also called actin filaments, as they consist of two intertwined strands of a globular protein known as actin.

They are the polymers of the protein actin and are smallest filaments of the cytoskeleton. They have a vital role in cell movements, cell division, and muscle contraction.

Microfilaments provide shape and rigidity to the cell. The flexible arrangement of filaments framework enables it to help in cell movement.

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on average, 90% of energy is transferred from one trophic level to the next. group startstrue or falsetrue, g

Answers

Only 10% of the energy is transferred to the next level at each rung of the food chain, with the remaining 90% being lost as heat.

Why do trophic levels lose 90 percent of their energy? What happens to all this energy?

Energy is lost as metabolic heat when animals from one trophic level are ingested by species from the next level, hence energy diminishes as it goes up the food chain.

The remaining 90% is utilised for survival, growth, and reproduction and is wasted as heat to the environment. The base of every energy pyramid is the Sun, from which energy is transported to the first trophic level of producers. Species that devour other organisms, or consumers, receive their energy from producers.

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Why are 6 co2 molecules required during the calvin cycle to make one molecule of glucose?.

Answers

Because the carbohydrate molecule has six carbon atoms, it takes six turns of the Calvin cycle to make one carbohydrate molecule (one for each carbon dioxide molecule fixed).

Answer:

Because the carbohydrate molecule has six carbon atoms.

it is normal to sometimes palpate a few lymph nodes in the neck of a healthy person. what are the characteristics of these nodes?

Answers

The characteristics of nodes are mobile, soft and non-tender. It is normal to palpate a few lymph nodes in the neck of a healthy person.

Normal lymph nodes are tiny, measuring 3 to 7 mm, often spool-shaped, smooth, finely edged, elastic in substance, and not fused with the skin or underlying tissues. They are also painless to the touch. In the neck, a typical lymph node is scarcely noticeable. When palpated, they have an elastic marble-like feel. One could confuse lymph nodes for muscles (or arteries). A lymph node needs to be able to roll both up and down and left to right. This will not be achievable in either of these two directions with a muscle or artery.

Hence, nodes are reservoir of the oozing out lymph from capillaries.

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What kind of mutation might result in a the formation of the codon tga along the coding strand of dna?.

Answers

A point mutation might result in the formation of the codon TGA along the coding strand of DNA.

A point mutation is a type of mutation in which a single nucleotide in a strand of DNA is changed. This can occur due to errors during DNA replication or exposure to mutagenic agents, such as radiation or certain chemicals.

In the case of a point mutation, the change in a single nucleotide can affect the sequence of codons along the coding strand of DNA. A codon is a sequence of three nucleotides that encodes a specific amino acid or a stop signal for protein synthesis.

If a point mutation occurs in the middle of a codon, it can change the sequence of the codon and alter the amino acid that is encoded. For example, if a point mutation changes a G nucleotide to an A nucleotide in the codon GGA, the resulting codon will be TGA. This will change the amino acid encoded by the codon from glycine to cysteine.

In this way, a point mutation can result in the formation of the codon TGA along the coding strand of DNA. This type of mutation has the potential to affect the structure and function of the protein that is produced, depending on the location and nature of the mutation.

a large amount of animal diversity is found in the segmented animals. what is it about repeated segmentation that leads to diversity? (5)

Answers

Segmentation allows for a greater degree of variation among species.

Demographic, psychographic, behavioral, and geographic segmentation are considered the 4 most important types of market segmentation, but there also are many other strategies you may use, along with several variations on the four most important types. here are numerous more methods you can want to look into.

Segmentation way to divide the market into elements, or segments, that are definable, available, actionable, and profitable and have an increased capacity. In different phrases, a corporation might find it impossible to goal the complete market, because of time, value, and effort regulations.

Segmenting lets you to more exactly reach a customer or prospect more based totally on their particular needs and wants. Segmentation will help better perceive your most valuable purchaser segments. enhance your return on advertising investment with the aid of only focusing on those probable to be your pleasant clients.

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Most of the energy released in citric acid cycle reactions is conserved in ________.

Answers

NADH and QH2 is the correct answer.Most of the energy released in citric acid cycle reactions is stored in NADH and QH2.

The tricarboxylic acid (TCA) cycle, also known as the Krebs or citric acid cycle, is the main source of cellular energy and an important component of aerobic respiration. The cycle uses chemical energy belonging to the coenzyme acetyl A (acetyl CoA) with the reducing power of nicotinamide adenine dinucleotide hydrogen (NADH). The two most energy-saving molecules from the redox reactions of the citric acid cycle are nicotinamide adenine dinucleotide hydrogen (NADH adenine) and flavin dinucleotide hydrogen (FADH2). Both molecules donate electrons that communicate with the electron transport chain to produce ATP.

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PLS HELP :"(
I dont think what I wrote down is correct just ignore it :")

Answers

Answer:

Facilitated diffusion and phosphate

Explanation:

For the second one, ATP stands for adenosine triphosphate, and ADP stands for adenosine diphosphate. "Tri" means three, so when ATP turns into ADP, it loses one phosphate.

Answer:

Facilitated diffusion & phosphate

give other person brainliest :)))

Explanation:

As the two strands of dna are unraveled, which enzyme relieves the strain on the two strands?.

Answers

Answer:

Gyrase

Explanation:

nucleation of microtubules takes place rapidly inside a cell, where it occurs in association with a variety of specialized structures called .

Answers

Tubulin solutions is the association with a variety of specialized structures

What are Tubulin solutions?

tubulin from bacteria BtubA/B is a near structural homolog of eukaryotic -tubulin and is hypothesized to have developed as a result of divergent evolution after receiving ancestral tubulin genes from a primitive eukaryotic cell to a bacterium. BtubA and BtubB are homogenous polypeptides that fold spontaneously without the need for eukaryotic chaperones, associate to form weak BtubA/B heterodimers, and come together to form protofilament that resemble tubulin.

According to the question:

Microtubule nucleation is the process in cell biology that starts the de novo creation of microtubules (MTs). The basic microtubule building blocks, tubulin dimers, which initially interact to nucleate a seed from which the filament elongates, are polymerized to produce these cytoskeleton filaments.

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What factors do you think might make it possible for a rogue wave to be more than twice the height of the two colliding waves?

Answers

There are a number of known mechanisms that result in rogue waves, including constructive interference, whereby small, fast waves catch up with slower waves and temporarily coalesce into an exceptionally huge wave.

What rogue wave to be more than twice the height?

According to scientific predictions, storms with stronger winds will occur more frequently during the ensuing decades.

Larger waves and thus bigger and more frequent rogue waves could be produced by more energy, which could result in more destruction and lost ships at sea. Rogue waves don't always occur in the water.

Therefore, Rogue waves can arise on relatively calm seas, while gale force winds can still be a factor.

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Which backup molecules are burned for energy during long term exercise when glucose is used up?​

Answers

Answer: Glycogen

Explanation:

HELP ASAP IM BEING TIMED you have to pick three of the choices

Select three specialties of athletic trainers.
offer memberships
communicate
teach anatomy
treat injuries
diagnose muscle/bone injuries
prevent injuries
motivate patients

Answers

The three specialties of athletic trainers form the list provides are:

diagnose muscle/bone injuriesprevent injuriestreat injuriesWho are athletic trainers?

An athletic trainer is described as a certified and licensed health care professional who practices in the field of sports medicine.

Injury prevention, assessment, management, treatment and rehabilitation are the five main areas in which Certified Athletic Trainers are uniquely trained.

Athletic trainers also acts as a vital communication link between the injured athlete, the physician, the coach, and sometimes the athlete's family.

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