Q: Which of the following best describes the chemical reaction for cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$} \rightarrow 6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} + \text{energy (ATP)}$$

Question 1

During which specific phase of the cell cycle does DNA replication occur, and what is the ploidy of the cell immediately after this phase?

Accepted Answer

DNA replication occurs during the S phase, and the cell remains diploid with duplicated chromosomes.

Question 2

Which of the following best describes the difference between asexual and sexual reproduction in terms of genetic variation?

Accepted Answer

Asexual reproduction results in offspring with identical DNA to the parent, while sexual reproduction results in offspring with a combination of DNA from two parents.

Question 3

During which stage of mitosis do sister chromatids separate and move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 4

Which of the following statements about cytokinesis in plant and animal cells is correct?

Accepted Answer

In plant cells, a cell plate forms to divide the cytoplasm, while in animal cells, a cleavage furrow forms.

Question 5

At what specific stage during meiosis do cells become haploid, and what event causes this change?

Accepted Answer

At the end of Meiosis I, homologous chromosomes separate, resulting in haploid cells.

Question 6

Which of the following best describes the process and result of crossing-over during meiosis?

Accepted Answer

Crossing-over occurs during Prophase I, resulting in the exchange of genetic material between homologous chromosomes and increased genetic diversity.

Question 7

How many functional egg cells and sperm cells are produced from one original cell during meiosis in humans?

Accepted Answer

One egg cell and four sperm cells

Question 8

Which of the following best describes the chemical reaction for cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$} ightarrow 6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} + 	ext{energy (ATP)}$$

Question 9

During glycolysis, what are the net products generated from one molecule of glucose?

Accepted Answer

2 ATP, 2 NADH, and 2 pyruvate

Question 10

Which of the following statements about NAD+ and NADH is correct?

Accepted Answer

NAD+ is reduced to NADH by gaining electrons during cellular respiration.

Question 11

Which stage of aerobic respiration produces the most ATP, and through what process is most of this ATP generated?

Accepted Answer

Electron transport chain; oxidative phosphorylation

Question 12

In the context of chemiosmosis during cellular respiration, what is the direction of proton ($$\mathrm{H^+}) $$flow through ATP synthase in mitochondria?

Accepted Answer

From the intermembrane space to the mitochondrial matrix

Question 13

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

The direct transfer of a phosphate group to ADP from a phosphorylated intermediate, producing ATP.

Question 14

Which of the following is the correct sequence of stages in aerobic respiration?

Accepted Answer

Glycolysis $$\rightarrow$$ Pyruvate oxidation $$\rightarrow$$ Citric acid cycle $$\rightarrow$$ Electron transport chain

Question 15

During the light reactions of photosynthesis, what is the main role of water ($$\mathrm{H_2O}$$)?

Accepted Answer

To provide electrons to replace those lost by chlorophyll in photosystem II

Question 16

Which of the following best describes the structure and function of the thylakoid membrane in chloroplasts?

Accepted Answer

It contains the photosystems and electron transport chain for the light reactions of photosynthesis.

Question 17

During the Calvin cycle (dark reactions) of photosynthesis, which molecule is reduced to form glucose?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 18

Which of the following statements about redox reactions in photosynthesis is correct?

Accepted Answer

Water is oxidized to oxygen, and carbon dioxide is reduced to glucose.

Question 19

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which of the following would most likely be observed in this patient’s cells?

Accepted Answer

Decreased ATP production due to impaired oxidative phosphorylation

Cell Cycle, Cell Division, Cellular Respiration, and Photosynthesis: Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard