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3 years ago

Which of the following statements about the nucleus is true?

Biology

2 answers:

Alex73 [517]3 years ago

8 0

The answer is B.The nucleus is surrounded by cell membrane that lets materials in and out.

ohaa [14]3 years ago

4 0

The answer to this question is B. The nucleus is surrounded by cell membrane that lets materials in and out.
This cell membrane is called nuclear membrane. Nuclear membrane has small holes that called the nuclear holes that allow materials to come in or out of the nucleus, depending on whether the materials is needed by the nucleus to do its current process.

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The type of reproductive barrier that occurs when two species mate but produce sterile hybrids is referred to as _______________

son4ous [18]

Post zygotic barrier

3 0

2 years ago

Effector molecule binding changes the behavior of enzymes by altering the equilibrium between the tense (T) state and the relaxe

9966 [12]

Answer:

Explanation:

<h2>Homotropic effector-</h2>

$\text{accounts for the sigmoidal nature of a velocity versus substrate concentration curve}$
$\text{An enzyme's substrate.}$

$\text{Works by altering T/R ratio.}$

The phrase $\text{"accounts for the sigmoidal nature of a velocity versus }$

is relevant and can be applied for homotropic effector molecules since the heterotropic effector molecules have the possibility and affinity to change the sigmoidal curve to a more potential hyperbolic curve contingent upon the allosteric effector to be positive or negative modulator.

The expression isn't relevant for both homotropic and heterotrophic effectors since the two of them can tie to the allosteric site of allosteric enzymatic compounds.

The phrase $\text{"works by altering the T/R ratio"}$ is significant and can be applied for both homotropic and heterotropic effectors.

The expression $\text{"an enzyme's substrate"}$ is significant and applied for homotropic effectors just as when substrate molecules tie to the allosteric site of enzyme then it is regarded as homotropic effectors. The heterotropic effectors are effectors apart from substrate molecules.

The phrase $\text{"alters the} \ K_m \ \text{ of an enzyme"}$ is not applied and insignificant to none of the heterotropic or homotropic effector molecules since $K_m$ is significant for the enzymes that obey the Michaelis-Menten equation, but allosteric enzymes do not obey the Michaelis-Menten equation. Homotropic and heterotropic effectors are viable and efficient for allosteric enzymatic chemicals that don't contain

4 0

2 years ago

Every time you eat a cookie or candy bar, your blood sugar increases. this triggers an increase in the hormone _____.

wel

Every time you eat a cookie or candy bar, your blood sugar increases. This triggers an increase in the hormone insulin. Insulin is a hormone made by the pancreas which allows your body to use sugar (glucose) from carbohydrates in the food that you eat, or to store glucose for future use. Insulin helps keeps your blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia).

5 0

3 years ago

Which type of ad would show a family using this product at dinnertime?

defon

Complete the sentence below by selecting the correct words from the drop-down menus.
There are three requirements for natural selection. The requirements are ✔ variationsimilarity, underpopulation✔ overpopulation, and ✔ adaptationextinction.

5 0

2 years ago

1. Which of the following best states a theme of Romeo and Juliet?

Alla [95]

1. From all those aforementioned, the one that best states a theme of Romeo and Juliet is "Actions in haste can bring about destruction". The answer to your question is D.

2. The statement is dramatically ironic because Friar Lawrence knows that Juliet has fallen into a deep sleep that resembles death. The answer to your question is B.

I hope that this is the answer that you were looking for and it has helped you.

6 0

3 years ago

Read 2 more answers