FREE AP Biology Question and Answers

One distinction between the two types of cellular reproduction—meiosis and mitosis—is that in meiosis

separation of sister chromatids occurs during the second division, whereas in mitosis separation of sister, chromatids occur during the first division

spindle fibers form during prophase, whereas in mitosis the spindle fibers form during metaphase

there is one round of cell division, whereas in mitosis there are two rounds of cell division

chromosomes are replicated during interphase, whereas in mitosis chromosomes are replicated during prophase

Correct! Wrong!

Explanation:
Sister chromatids in mitosis separate during the metaphase of that cell cycle, whereas in meiosis, they separate during the second metaphase of that cell cycle (Meiosis II).

A volcanic eruption decimates a sizable island. With the exception of the group's largest male and female horses, the majority of the horses perish. They remain alive, procreate, and maintain the population. Given that weight is highly heritable and that the distribution of weights resembles a binomial distribution, the following generation's kids should have

a lower mean weight compared with their parents

a higher mean weight compared with members of the original population

a higher mean weight compared with their parents

the same mean weight as members of the original population

Correct! Wrong!

Explanation:
Due to the death of all the lighter horses in the first population, the mean weight of the progeny in the following generation will be greater than the mean weight of the original population. Weight will consequently be distributed normally, with the heavier end (to the right of the graph).

A guinea pig cross is performed by a scientist using two animals with identical black coats. White hair coat is subordinate to black hair coat. One-fourth of the offspring have white coats, compared to three-quarters who have black coats. Most likely, the parents' genotypes were

Bb × Bb

BB × Bb

bb × bb

Bb × bb

Correct! Wrong!

Explanation:
Utilize the ratio of the progeny provided in the question and go backward to discover the genotype of the parents. Black-haired guinea pigs outnumber white-haired guinea pigs 3:1. Therefore, the children were BB, Bb, Bb, and bb. To determine the parents' genotypes, create a Punnett square now. Bb and Bb are the parents.

Which of the following statements most accurately describes why a population is referred to as the evolutionary unit?

Natural selection affects individuals, not populations

Genetic changes can only occur at the population level.

Individuals cannot evolve, but populations can

The gene pool in a population remains fixed over time

Correct! Wrong!

Explanation:
Because changes in population genetic makeup can be tracked throughout time, populations can be thought of as evolutionary units.

Which of the following DOES NOT describe a bacterial trait?

Membrane-bound cellular organelles

Plasma membrane consisting of lipids and proteins

Ribosomes that synthesize polypeptides

Circular double-stranded DNA

Correct! Wrong!

Explanation:
Prokaryotes, which include bacteria, don't have membrane-bound organelles like eukaryotes do. Ribosomes, a cell wall, and circular double-stranded DNA are all components of bacteria.

The endocrine system uses a variety of feedback mechanisms to maintain homeostasis. Which of the following best describes favorable criticism?

An enzyme is allosterically inhibited by the product of the reaction it catalyzes.

Infant suckling causes a mother's brain to release oxytocin, which in turn stimulates milk production.

When blood sugar levels decrease to normal after a meal, insulin is no longer secreted.

When ATP is abundant the rate of glycolysis decreases

Correct! Wrong!

Explanation:
A greater response to a stimulus is known as positive feedback.

In humans, the Krebs cycle takes place in the

outer mitochondrial membrane

mitochondrial matrix

intermembrane space

inner mitochondrial membrane

Correct! Wrong!

Explanation:
In the matrix of the mitochondria, the Krebs cycle takes place. Don't forget to go over each stage of aerobic respiration's website. The first stage of aerobic respiration, glycolysis, takes place in the cytoplasm. The inner mitochondrial membrane is where the electron transport chain is located. As protons (H+ ions) travel from the intermembrane space to the mitochondrial matrix, oxidative phosphorylation takes place.

FREE AP Biology Question and Answers

One distinction between the two types of cellular reproduction—meiosis and mitosis—is that in meiosis

A guinea pig cross is performed by a scientist using two animals with identical black coats. White hair coat is subordinate to black hair coat. One-fourth of the offspring have white coats, compared to three-quarters who have black coats. Most likely, the parents' genotypes were

Which of the following statements most accurately describes why a population is referred to as the evolutionary unit?

Which of the following DOES NOT describe a bacterial trait?

The endocrine system uses a variety of feedback mechanisms to maintain homeostasis. Which of the following best describes favorable criticism?

In humans, the Krebs cycle takes place in the

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