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Westkost [7]
3 years ago
10

A cell’s progression through the cell cycle requires the activity of several cyclin-dependent kinases. What are these cdks, how

are they activated, how are they inactivated, when do you see their levels rise and what are their targets?
Biology
1 answer:
notka56 [123]3 years ago
7 0

Answer: 1. Cyclin-dependent kinases.

2. The activation process is in two steps: binding of cyclin to cdk and then phosphorylation of cdk cyclin.

3. They are activated when cdks sends signals to cell that is pass already into the next stage of the cell cycle.

4. They are inactivated by the combination of P21 and Thr-14/Tyr-15 phosphorylation after uv induced DNA damage.

5. Changes are seen in target protein level when cdks level rises.

6. The targets are protein that promotes cell divisions.

Explanation:

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What is a population?
olganol [36]

Answer:

What is population?

A group of organisms of different species interacting with each other and the environment is called populatin.

3 0
3 years ago
A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white co
Rina8888 [55]

The question is incomplete. The complete question is:

Question: A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears of corn that have an approximately even mix of yellow and white kernels. Which term best describes the relationship between the two alleles?

a) Incomplete dominance

b) Genetic recombination

c) Chimerism

d) Codominance

Answer:

d) codominance

Explanation:

Codominance is a pattern of inheritance when none of the alleles of a gene is able to mask the expression of the other allele of the same gene. When the two alleles are present together in a heterozygous genotype, both are expressed and the phenotype of the heterozygote is different from both the pure breeding parents. In the given example, cross-pollination of yellow corn and white corn results in the ears of corn that have an approximately even mix of yellow and white kernels. This means that the heterozygote expresses both the allele for the corn color. Therefore, it represents codominance.

3 0
3 years ago
What is the structure used in reproduction in pteridophytes?
Pepsi [2]
Large floral are used in the reproduction in pteridophytes
7 0
3 years ago
Almost all coal used today was produced during the Carboniferous period from dead animals in the swamps.
Ann [662]

Answer:

False

Explanation:

Almost all coal that is used today has its origins in the Carboniferous period. The Carboniferous period was a warm and wet one, with the majority of the land being swampy and covered with dense rainforests of ancient tree species. By the end of this period, the climate quickly changed, resulting int he collapse of the rainforests. As the trees were dying out, they were falling in the swamps, quickly being covered by the mud, so remaining largely preserved. Over time they got exposed to higher pressure and temperatures as they were getting deeper into the crust, eventually resulting in the formation of the coal.

7 0
3 years ago
Which describes the variable that is changed to test the prediction
slavikrds [6]

D)independent

Explanation:

An independent variable is a variable that is changed to test the prediction in an experiment. Independent variables are the cause in an experiment. They are the ones that produces the effect.

  • Changing independent variables produces different effects in an experiment.
  • These effects are the dependent variables
  • Independent variables do not depend on the outcome of the experiment.
  • They are the ones that determines how a reaction proceed and what might likely happen.

learn more:

Experiment brainly.com/question/5096428

#learnwithBrainly

6 0
4 years ago
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