Chapter 3 Quiz 1 (2nd Secondary Biology)

63 Questions | By Semsem612 | Last updated: Jan 29, 2021 | Total Attempts: 15

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Chapter 3 Quiz 1 (2nd Secondary Biology)

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1.

The figure below is of a cell with one mitochondrion. Where does each of the following reaction occur inside the cell?Production of pyruvic acid / Oxidation of pyruvic acid / Transfer of electrons from electron donors to electron acceptors.
- A.
  
  Production of pyruvate in (1) / Oxidation of pyruvate in (2) / Transfer of electrons in (3)
- B.
  
  Production of pyruvate in (3) / Oxidation of pyruvate in (2) / Transfer of electrons in (4)
- C.
  
  Production of pyruvate in (2) / Oxidation of pyruvate in (1) / Transfer of electrons in (4)
- D.
  
  Production of pyruvate in (1) / Oxidation of pyruvate in (4) / Transfer of electrons in (3)
2.

Which of the following correctly explain the function a mitochondrion?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
3.

The equation in the figure below is called ....
- A.
  
  Oxidative phosphorylation
- B.
  
  Oxidative decarboxylation
- C.
  
  Pyruvate production
- D.
  
  Pyruvate reduction
4.

Oxygen is needed in the Electron Transport System to……..
- A.
  
  Prevent a pile-up (accumulation) of hydrogen ions
- B.
  
  Prevent a pile-up of NAD⁺
- C.
  
  Act as a final electron acceptor that helps to move electrons down a chain for the production of ATP
- D.
  
  Oxidize glucose molecules
5.

Each NADH entering the Electron Transport System from Krebs cycle produces…..
- A.
  
  1 ATP
- B.
  
  2 ATP
- C.
  
  3 ATP
- D.
  
  ATP
6.

Each FADH2 entering the Electron Transport system from Kreb's cycle produces…..
- A.
  
  1 ATP
- B.
  
  2 ATP
- C.
  
  3 ATP
- D.
  
  4 ATP
7.

Which of the following molecules will diffuse out of the cell, enter the bloodstream, and be released from the lungs during aerobic cellular respiration?
- A.
  
  Oxygen
- B.
  
  Carbon dioxide
- C.
  
  ATP
- D.
  
  Glucose
8.

During aerobic cellular respiration, which molecule originates from the digestive system?
- A.
  
  Oxygen
- B.
  
  ATP
- C.
  
  Water
- D.
  
  Glucose
9.

Cytochromes are located …..
- A.
  
  Within the cytoplasm of a cell
- B.
  
  On the cristae of mitochondria
- C.
  
  Within the matrix of mitochondria
- D.
  
  Within the stroma of chloroplasts
10.

Which of the following statements about aerobic cellular respiration in the human body is NOT correct?
- A.
  
  Glucose and oxygen are delivered to the cells by the bloodstream.
- B.
  
  Carbon dioxide and water are removed from the cells by the bloodstream.
- C.
  
  ATP remains in the cytoplasm as a source of energy for the cell to do work.
- D.
  
  In mitochondria, glucose is broken down where carbon dioxide, water as well as ATP are produced.
11.

Which of the following statements is correct?
- A.
  
  NAD is reduced and becomes NADH2 when it accepts hydrogen atoms.
- B.
  
  NAD is oxidized and becomes NADH when it accepts hydrogen atoms.
- C.
  
  NAD is reduced and becomes NADH2 when it releases hydrogen atoms.
- D.
  
  NADH2 is reduced to NAD when the hydrogen atoms are passed to another acceptor.
12.

Which of the following statements is NOT true about NAD⁺?
- A.
  
  NAD⁺ can only be used once before it must be resynthesized.
- B.
  
  NAD⁺ can accept hydrogen atoms and is reduced to NADH2.
- C.
  
  NADH2 can carry the hydrogen atoms to another acceptor, becoming oxidized to NAD⁺ again.
- D.
  
  NAD⁺ is involved in cellular respiration.
13.

Which of the following statements is NOT correct about glycolysis?
- A.
  
  Glycolysis takes place within the cytoplasm.
- B.
  
  Glycolysis uses two ATP but forms four ATP, resulting in a net gain of two ATP molecules.
- C.
  
  During glycolysis, two molecules of NAD⁺ are reduced to form 2NADH + 2H⁺
- D.
  
  Glycolysis begins with a glucose molecule and ends with four pyruvate molecules.
14.

How many times does the Krebs cycle turn per glucose molecule?
- A.
  
  Once
- B.
  
  Twice
- C.
  
  Three times
- D.
  
  Four times
15.

Which of the following molecules is NOT formed as a result of the Krebs cycle during aerobic cellular respiration?
- A.
  
  NADH
- B.
  
  ATP
- C.
  
  ADP
- D.
  
  FADH2
16.

Which molecule will combine with the four-carbon oxaloacetate in the Krebs cycle to form the six-carbon citrate?
- A.
  
  Lactic acid
- B.
  
  NADH
- C.
  
  FADH2
- D.
  
  Acetyl-CoA
17.

Which molecule is the final acceptor of electrons at the end of the electron transport system in aerobic cellular respiration?
- A.
  
  Oxygen
- B.
  
  Carbon dioxide
- C.
  
  Lactic acid
- D.
  
  Citric acid
18.

Which of the following overall equations represents aerobic cellular respiration?
- A.
  
  C₆H₁₂O6 -----> 2 pyruvic acids + 2 ATP
- B.
  
  6 CO₂ + 6 H₂O + energy -----> C₆H₁₂O₆ + 6 O₂
- C.
  
  C₆H₁₂O₆ + 6 O₂ -----> 6 CO₂ + 6 H₂O + energy
- D.
  
  C₆H₁₂O₆ -----> 2 lactic acid + 2 ATP
19.

Which of the following pathways and reactions will result in the production of the most ATP molecules during aerobic cellular respiration of one glucose molecule?
- A.
  
  Glycolysis
- B.
  
  Krebs cycle
- C.
  
  Electron transport system
- D.
  
  Fermentation
20.

Which of the following overall equations represents fermentation that occurs in yeast cells?
- A.
  
  C₆H₁₂O₆ -----> 2 pyruvic acid + 2 ATP
- B.
  
  C₆H₁₂O₆ + 6 O₂ -----> 6 CO₂ + 6 H₂O + energy
- C.
  
  C₆H₁₂O₆ -----> 2 lactic acid + 2 ATP
- D.
  
  C₆H₁₂O₆ -----> 2ethyl alcohol + 2 CO₂ + 2 ATP
21.

______ is a series of enzymatic reactions by which glucose is incompletely metabolized to lactate or carbon dioxide and alcohol.
- A.
  
  Fermentation
- B.
  
  The Krebs cycle
- C.
  
  The electron transport system
- D.
  
  Glycolysis
22.

When oxygen is NOT available to an animal cell, which of the following statements is correct?
- A.
  
  Only the electron transport system remains operative.
- B.
  
  More hydrogen gas is produced because oxygen, the final acceptor, is not present.
- C.
  
  The cells production of ATP molecules is cut.
- D.
  
  Glycolysis still occurs because NADH2 passes its hydrogen atoms to pyruvate.
23.

Out of 38 molecules of ATP produced by respiration of one glucose molecule, the number of ATP molecules produced from NADH2 are …..
- A.
  
  22 ATP
- B.
  
  36 ATP
- C.
  
  30 ATP
- D.
  
  34 ATP
24.

Out of 38 molecules of ATP produced by respiration of one glucose molecule, the number of ATP molecules produced from FADH2 are …..
- A.
  
  4 ATP
- B.
  
  8 ATP
- C.
  
  20 ATP
- D.
  
  22ATP
25.

Inner membrane of mitochondria folds inwards, ….
- A.
  
  Forming the cristae.
- B.
  
  Increasing the metabolic and energy-producing activities of mitochondria.
- C.
  
  Allowing a greater amount of membrane to be packed into the mitochondrion.
- D.
  
  All of them.