Question 1

Which of the following best describes the main function of the electron transport chain in cellular respiration?

Accepted Answer

To generate a proton gradient across the inner mitochondrial membrane for ATP synthesis

Question 2

A plant is exposed to light, but its thylakoid membranes are punctured so that the interior of the thylakoids is no longer separated from the stroma. Which process will be most directly affected?

Accepted Answer

The synthesis of ATP during the light reactions

Question 3

During glycolysis, what is the net gain of ATP and NADH molecules per molecule of glucose?

Accepted Answer

2 ATP and 2 NADH

Question 4

Which of the following statements about CAM (Crassulacean Acid Metabolism) plants is correct?

Accepted Answer

They fix CO$$_2 at $$night and store it as malic acid

Question 5

A cell with a defective spindle apparatus would have difficulty completing which phase of mitosis?

Accepted Answer

Anaphase

Question 6

A woman with blood type A and a man with blood type B have a child with blood type O. What are the possible genotypes of the parents?

Accepted Answer

Both parents must be heterozygous (I$$^Ai $$and I$$^Bi)$$

Question 7

Which of the following best explains why cancer cells can divide indefinitely?

Accepted Answer

They maintain telomere length by expressing telomerase

Question 8

If a cell has 24 chromosomes at the start of meiosis, how many chromosomes will each gamete have at the end of meiosis II?

Accepted Answer

12

Question 9

Which of the following is an example of incomplete dominance?

Accepted Answer

A red-flowered plant crossed with a white-flowered plant produces pink-flowered offspring

Question 10

Which process is responsible for the independent assortment of alleles during gamete formation?

Accepted Answer

Random alignment of homologous chromosomes during metaphase I of meiosis

Question 11

A pedigree shows a trait that appears in every generation and affects both males and females equally. What is the most likely mode of inheritance?

Accepted Answer

Autosomal dominant

Question 12

Which of the following best describes the law of segregation?

Accepted Answer

Alleles for a trait separate during gamete formation so that each gamete receives only one allele

Question 13

A man with hemophilia (an X-linked recessive disorder) and a woman who is a carrier have a son. What is the probability that the son will have hemophilia?

Accepted Answer

$$0.5$$

Question 14

Which of the following events increases genetic variation during meiosis?

Accepted Answer

Crossing over between homologous chromosomes during prophase I

Question 15

Which of the following is a direct product of the light reactions of photosynthesis?

Accepted Answer

NADPH

Question 16

A cell is observed to have chromosomes aligned at the center of the cell, with spindle fibers attached to kinetochores. Which phase is this cell in?

Accepted Answer

Metaphase

Question 17

Which of the following best explains why loss of density-dependent inhibition is a hallmark of cancer cells?

Accepted Answer

Cancer cells continue to divide even when crowded, forming tumors

Question 18

Which of the following is true regarding the Calvin cycle?

Accepted Answer

It uses ATP and NADPH to convert CO$$_2$$ into glucose

Question 19

A genetic cross between two heterozygous individuals (Aa x Aa) results in what expected genotypic ratio among the offspring?

Accepted Answer

$$1:2:1 (AA$$:Aa:aa)

Question 20

Which of the following is a likely consequence of nondisjunction during meiosis?

Accepted Answer

A gamete with an abnormal number of chromosomes

General Biology: Midterm II Study Guide (Lectures 7-13)

Guida di studio - Domande di pratica

Study guide - Flashcard