Two protein kinases, PK1 and PK2, work sequentially in an intracellular signaling pathway. You create cells that contain inactivating mutations in the genes that encode either PK1 or PK2 and find that these cells no longer respond to a particular extracellular signal. You also create cells containing a version of PK1 that is permanently active and find that the cells behave as though they are receiving the signal even when the signal is not present. When you introduce the permanently active version of PK1 into cells that have an inactivating mutation in PK2, you find that these cells also behave as though they are receiving the signal even when no signal is present.
Answer the following question in the space give.
A. From these results, does PK1 activate PK2, or does PK2 activate PK1? Explain your answer.
Answer:
The answer is "PK1 activates PK2"
Explanation:
All enzymes were required again for the transmission of a signal. If Pk1 is continuously active, pk2 will no longer be required, as per my theory, can trigger pk1, therefore the cells were if they amplify the message even when they're not active. But since both enzymes require regular copies together for transduction, pk2 is simple and pk1 requires to also be activated.
some _______ environmental changes can cause tge genes of an entire population to change.
Answer:
some unfavorable environmental changes can cause the genes of an entire population to change.Unfavorable
Explanation:
4. A bacterium is discovered with new mutated form of isocitrate dehydrogenase that catalyzes the same reaction but produces hydrogen gas instead of NADH. a. Write a balanced equation for the new reaction. b. What affect does this mutation have on the amount of ATP produced from one glucose molecule
A bacterium is discovered with a new mutated form of isocitrate dehydrogenase that catalyzes the same reaction but makes H₂; the reactant is isocitrate, and the product is alpha-ketoglutarate. As the proton count decreases, less ATP is produced.
What is the importance of the proton gradient in energy production?The proton gradient is formed during the electron transfer chain (ETC) by using all the NADH and FADH₂ that are derived from the glycolysis and kreb cycle. NADH and FADH₂, for example, are two compounds that travel through the different complexes to create the proton gradient, which later produces ATP; however, when H₂ is produced instead of NADH, less of a proton gradient is formed, and thus less ATP is produced. The equation is isocitrate+ NAD+ → alpha-ketoglutarate +CO₂ + H+
Hence, the reaction is composed of substrates isocitrate, NAD+, and products alpha-ketoglutarate, CO₂, and a proton (H+), which will be formed with significantly less ATP than the normal ATP produced from the one glucose.
Learn more about the proton gradient here.
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Which of the following answer choices best describes the image shown above?
Choose 1 answer:
It depicts sexual reproduction occurring through the fusion of gametes, a process that leads to
genetic variation.
It depicts sexual reproduction occurring through parthenogenesis, a process that leads to genetic
variation
It depicts asexual reproduction occurring through binary fission, a process that does not lead to
genetic variation
It depicts asexual reproduction occurring through budding, a process that does not lead to genetic
variation
Answer:it depicts asexual reproduction occurring through binary fission, a process that does not lead to genetic variation
Explanation:
The choice that best describes the image shown above is it depicts asexual reproduction occurring through binary fission, a process that does not lead to genetic variation. The correct option is C.
What is asexual reproduction?Asexual reproduction is a mode of reproduction in which only one parent is needed. There are different types of asexual reproduction, like budding, vegetative reproduction, fragmentation, and binary fission.
This reproduction does not require the fusion of sperm and egg. The offspring is exactly identical to the parent. Many organisms reproduce in asexual reproduction, hydra, paramecium, starfish, etc.
Thus, the correct option is C. it depicts asexual reproduction occurring through binary fission, a process that does not lead to genetic variation.
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A group of students burned three different kinds of food and
collected data.
Food
sample
Mass
Starting
temp.
Ending
temp.
1
100 g
20°C
24°C
2
50 g
20°C
30°C
3
110 g
20°C
27°C
6a. How many calories were contained in each piece of food? Remember:
cal = m XAT
Answer:
sample
Mass
Starting
temp.
The owners of a local bakery ask for your help in improving a special yeast strain they use to make bread. They would like you to help them design experiments using RNA interference to turn off genes, to allow them to test their hypothesis that certain genes are important for the good flavors found in their bread. Of the components in the following list, which is the most important to check for in this yeast strain if you would like this project to succeed?
a. the presence of foreign double-stranded RNA
b. the presence of genes in the genome that code for RISC proteins
c. the presence of miRNA genes in the genome
d. the presence of single-stranded siRNAs within the cell
Answer:
b. the presence of genes in the genome that code for RISC proteins
Explanation:
The RNA interference (RNAi) mechanism is a naturally occurring pathway by which eukaryotic cells can silence specific genes both at the transcriptional (eg., by triggering DNA methylation on specific loci) and posttranscriptional (e.g., by triggering mRNA degradation) levels. This mechanism (RNAi) is widely used in molecular biology laboratories in order to silence genes and thus understand their functions. During the RNAi pathway, double-stranded RNAs (dsRNAs) are cleaved into small double-stranded RNA (dsRNA) molecules known as small interfering RNAs (siRNAs) or microRNAs (miRNAs) by an enzyme referred to as "Dicer". Subsequently, these small non-coding RNAs bind to an enzymatic complex known as RNA-induced silencing complex (RISC) that contains a ribonuclease enzyme, i.e., an enzyme that degrades RNA. Finally, the small non-coding RNA (either siRNAs or miRNAs) that are complementary to the RNA target directs the RISC complex to bind and cleave specific mRNAs, thereby silencing gene expression (in this case, by the inhibition of protein translation).
I’m not sure if the answer
Your Hot Wheels car travels 120 cm in 1.34 seconds. What is its SPEED?
0.01 cm/s
67.55 cm/s
89.55 cm/s
160.80 cm/s
Answer:
c) 89.55 cm/s
Explanation:
in this situation you have to divide to find the speed-
120/1.34 = 89.55223880...
closest answer is c
or rounded
89.55
hope this helps.
Which components makes up the "backbone" of the DNA molecule?
O phosphate and nitrogen bases
O deoxyribose sugar only
O nitrogen bases
O phosphate and deoxyribose sugar
With floral characteristics, can one predict the type of pollination that can occur in a flower?
Answer:
Try this website: https://www.fs.fed.us/wildflowers/pollinators/What_is_Pollination/syndromes.shtml
Explanation:
Which labels correctly complete the diagram
Answer:
The answer is the first one, i hope it helps
Explanation:
constellation are group of stars that from patterns.
True or False
Answer:
true
Explanation:
id 79465414692 password FxVg9y
Please Help
Which resource is renewable?
A. Wind
B. Diamonds
C. Aluminum
D. Coal
Answer:
A. Wind
wind is a renewable resource because there is unlimited supply of it.
Explanation:
If a warm air mass and a cold air mass come together which one goes underneath?
Cómo se denomina al tipo de acción metabólica que genera la glucólisis y respiración celular?
Answer:
catabolismo.
Explicación:
El tipo de acción metabólica que genera la glucólisis y la respiración celular se llama catabolismo porque en ambos procesos se descomponen las moléculas lo cual es una acción catabólica. El catabolismo es una forma de metabolismo que descompone moléculas más grandes en unidades más pequeñas que son utilizadas por la célula para liberar energía o utilizadas en otras reacciones anabólicas significa la síntesis de moléculas complejas en organismos a partir de otras más simples.
What signals your body to breathe out, or exhale. We learning about the respiratory system
Answer: Your brain constantly gets signals from your body which detect the amount of oxygen and carbon dioxide in your blood. Your brain will send signals to the muscles involved in breathing and adjust your breathing rate depending on how active you are.
HOPE THIS HELPED HAVE A WONDERFULL DAY!
If an object is stationary, it means....
A) There are balanced forces acting on the object
B) There are unbalanced forces acting on the object
C) The object is in motion
D) The object is experiencing air resistance
PLEASE HELP! I WILL GIVE BRAINLIEST. What 2 factors affect organisms and their habitats, and give examples of each
Answer:
There are two categories of these factors: abiotic and biotic. Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms. Abiotic factors include water, sunlight, oxygen, soil and temperature.
Explanation:
Biotic factors are interactions associated with living organisms. They can also influence the distribution of organisms in an ecosystem. grazing - too little leads to dominant plants outcompeting other species, too much reduces species numbers overall. Both decrease biodiversity.
Abiotic factors affect the ability of organisms to survive and reproduce. Abiotic limiting factors restrict the growth of populations. They help determine the types and numbers of organisms able to exist within an environment.
: ) x
River dolphins are morphologically distinct from other dolphins and are primarily restricted to freshwater ecosystems in Asia and South America.
a. True
b. False
Answer:
a. True
Explanation:
The river dolphin is a group of aquatic animals that is specially adapted to the fresh water and are relatively smaller compared to the other dolphins. They have evolved to survive in shallow waters and strong-river currents. These dolphins are not very widely disturbed and are found in certain deltas and rivers.Why can matter be weighed?
O A. It has mass.
O B. It has width.
O c. It has volume.
OD. It has pressure.
Answer:
A. It has mass.
C. It has volume.
Explanation:
The matter has both Mass and volume.
Mass and volume are two units used to measure objects. Mass is the amount of matter an object contains, while volume is how much space it takes up.
Hope it is helpful...The diagram shows a portion of the fossil record. Select ALL of the statements that are supported by the record.
A) Life moved to land in layer 6.
B) Layer 5. is older than layer 2.
C) Fish were the first life forms.
D) The oldest life existed in water. Shelled organisms existed before fish.
Answer:
i think it's D and E...
*_*
How many total carbonate ions would be present in the formula for aluminum carbonate?
Select one:
a.
3
b.
2
c.
1
d.
4
Answer:
its d
Explanation:
Most earthquakes happen along the ?
A.fault
B.volcanic mountains
C.pacific ring of fire
D.mid- ocean ridge
¿Qué organismo se nutren a través de la fotosíntesis?
Las celulas vegetales es decir las plantas
The amount of light, pressure, and temperature are examples of?
Explanation:
The answer is No. You know light from Stars travel in cold temperature of space and different pressure as they enter our planet after travelling many light year to reach us at the same the speed.
Light bends when entering a different medium(refraction). Even if the medium is same and the temperature is different it will get bend. As the 2 different temperature air behave like 2 mediums (Due to distribution of atoms ).
But light doesn't’ bend by heating or by putting pressure on it.
I need help please!!!
Answer:
I believe the answer is x
Explanation:
I can't really tell from the graph bit I hope this helps
the development of lateral roots is intiated by the the cork or periderm
Answer:
Because lateral roots are initiated in the pericycle and grow out through the cortex and epidermis, they are said to have an internal, or endogenous, origin, in contrast to the external, or exogenous, origin of leaves and the apical meristem of stems (see below Stems).
Explanation:
Please match the following terms with the appropriate definitions.
Distance
[ Choose ]
Displacement
[ Choose ]
Slope
[ Choose ]
SI unit for speed and velocity
[ Choose ]
SI unit for acceleration
[ Choose ]
Question 6
Below which of the following pH is rain regarded as 'acid rain'?
10
6
9
7
Answer:
10
Explanation:
Why are ferns and mosses poorly adapted to a terrestrial life
Answer:
Because they require a WATER medium for reproduction
Explanation:
Ferns are a group of living organisms under the division; Pteridophyta while mosses belong to the group Bryophyta. Mosses are considered primitive and non-vascular plants because they lack true stems, leaves and roots or vascular tissues. while ferns possess these organs, hence, are said to be vascular.
However, ferns and mosses are poorly adapted to a terrestrial life i.e. life on land because they both require a water medium for their motile male gametes to swim and fertilize their eggs (female gametes).