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2 years ago

CDKs are important in the regulation of the cell cycle. They carry out their function by:

Biology

1 answer:

nikdorinn [45]2 years ago

6 0

Answer:

A. Adding phosphate groups to target proteins

Explanation:

CDKs (cyclin-dependent kinases) are the protein kinases involved in regulation of the cell cycle. Cyclins are the regulatory proteins that serve to activate the cyclin-dependent kinases. The activity of various Cdks increases and then decreases as the cell proceeds through the cell cycle.

Binding of a specific CDK with its corresponding cyclin results in formation of a cyclin–Cdk complex. Cyclin–Cdk complexes serve to phosphorylate the target enzymes and other proteins. Phosphorylation activates some of these proteins while deactivating the others. For example, the protein p27 is degraded upon phosphorylation. Since p27 is one of the major inhibitor of cell division, the reduced levels of p27 makes the non-dividing cell s to enter the cell division.

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Answer:

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2 years ago

During each heartbeat, about 80 g of blood is pumped into the aorta in approximately 0.2 s. during this time, the blood is accel

aivan3 [116]

I assume that in this item, we are asked to solve for the force exerted during the heartbeat. Force is the product of the mass and acceleration. To solve for the acceleration in this item, we divide the velocity by time.
a = 1 m/s / 0.2 s = 5 m/s²
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2 years ago

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Mkey [24]

Answer:

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2 years ago

Rosa drew a diagram to compare substitution mutations and insertion mutations.

djverab [1.8K]

<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2>

$\huge\boxed{Option A}$

<h2>_____________________________________</h2><h2>Mutations:</h2>

Mutations are the changes produced in the nucleotide sequence of the genome.

There are four main types of mutations

Substitution

Insertion

Deletion

Duplication.

<h2>_____________________________________</h2><h3>DELETION:</h3>

A small segment of chromosome mat be missing. This condition is known as deletion.

For example, Normal chromosome has A B C D E F G. If deletion mutation occurs then mutated chromosome has A D E F G and B C got deleted.

<h2>_____________________________________</h2><h3>DUPLICATION:</h3>

In this condition, a part of chromosome present in exec ess to the normal chromosome.

For example, Normal Chromosome has A B C D E F G. If duplication mutation occurs, then mutated chromosome had A B C B C D E F G and B C is duplicated.

<h2>_____________________________________</h2><h3>SUBSTITUTION MUTATION:</h3>

Substitution is a type of mutation where one base pair is replaced by a different base pair.

For example, in the sequence CAAGT, if C replaces G, it is a substitution mutation.

<h3>INSERTION MUTATION:</h3>

In genetics, an insertion is the addition of one or more nucleotide base pairs into a DNA sequence.

For example, in the sequence CAAGT, if extra base G gets inserted after C, the new sequence would be CGAAGT.

Both substitution and insertion mutations change the position of nucleotide thus, the type of amino acid.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2>

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1 year ago

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In many states, the legal limit for all bacteria present in pasteurized milk is not to exceed 20,000 CFU/mL. You have been away

zaharov [31]

Answer:

a. The formula for finding the number of colonies in a given volume is,

CFU/ml, here CFU is the colony forming units or the number of colonies formed in a volume plated in ml × dilution

The dilution factor given in the question is 1 × 10⁻⁴ and the number of colonies given is 186. Therefore, the number of bacteria present in the given 1 ml of the milk is,

CFU/ ml = 186 / 1 × 10⁻⁴ = 186 × 10⁴.

Hence, the concentration of bacteria in the milk is 186 × 10⁴ CFU/ml.

b) The limit of the bacterial concentration in the pasteurized milk is 20000 CFU/ml, however, it can be seen that the sample of the milk possess more concentration of bacteria than the desired value. Therefore, the milk is not safe to drink by Public Health Standards.

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2 years ago