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Energy, Respiration, Photosynthesis - Past exam | BIO 311C, Exams of Biology

The University of Texas at AustinBiology
Prof. Anita G. Latham

Material Type: Exam; Professor: Latham; Class: INTRODUCTORY BIOLOGY I; Subject: Biology; University: University of Texas - Austin;

Typology: Exams

2011/2012

Uploaded on 04/12/2012

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lee-kirstie41 ๐Ÿ‡บ๐Ÿ‡ธ

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MC Practice questions from old exams are given here. For short ans
practice, please refer to worksheets provided.
Topics: Energy, Respiration, Photosynthesis
1) Which of the following statements is a correct distinction between cyclic and
noncyclic electron flow?
A) only noncyclic electron flow produces ATP
B) Cyclic electron flow produces ATP, NADPH and O2
C) Photophosphorylation to produce ATP is unique to noncyclic electron flow
D) Only cyclic electron flow can operate in the absence of photosystem 2
E) C and D
2) In chemiosmosis, the energy released during transport of electrons down the ETC is
used to:
A) Make ATP
B) Pump H+ down concentration gradient
C) Pump H+ against concentration gradient
D) Make more electrons
3) Why are C4 plants able to photosynthesize with no apparent photorespiration?
A) They do not participate in the Calvin cycle.
B) They use PEP carboxylase to initially fix CO2.
C) They are adapted to cold, wet climates.
D) They conserve water more efficiently.
E) They exclude oxygen from their tissues.
4) Which of the following reactions would be endergonic?
A) HCl ๏‚ฎ H+ + Cl-
B) C6H12O6 + 6 O2 ๏‚ฎ 6 CO2 + 6 H2O
C) ATP ๏‚ฎ ADP + Pi
D) glucose + fructose ๏‚ฎ sucrose
E) All of the above
5) During aerobic respiration, electrons travel downhill in which sequence?
A) food โ†’ citric acid cycle โ†’ ATP โ†’ NAD+
B) food โ†’ NADH โ†’ electron transport chain โ†’ oxygen
C) glucose โ†’ pyruvate โ†’ ATP โ†’ oxygen
D) glucose โ†’ ATP โ†’ electron transport chain โ†’ NADH
E) food โ†’ glycolysis โ†’ citric acid cycle โ†’ NADH โ†’ ATP
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Download Energy, Respiration, Photosynthesis - Past exam | BIO 311C and more Exams Biology in PDF only on Docsity!

MC Practice questions from old exams are given here. For short ans

practice, please refer to worksheets provided.

Topics: Energy, Respiration, Photosynthesis

  1. Which of the following statements is a correct distinction between cyclic and noncyclic electron flow? A) only noncyclic electron flow produces ATP B) Cyclic electron flow produces ATP, NADPH and O C) Photophosphorylation to produce ATP is unique to noncyclic electron flow D) Only cyclic electron flow can operate in the absence of photosystem 2 E) C and D
  2. In chemiosmosis, the energy released during transport of electrons down the ETC is used to: A) Make ATP B) Pump H+ down concentration gradient C) Pump H+ against concentration gradient D) Make more electrons
  3. Why are C4 plants able to photosynthesize with no apparent photorespiration? A) They do not participate in the Calvin cycle. B) They use PEP carboxylase to initially fix CO 2. C) They are adapted to cold, wet climates. D) They conserve water more efficiently. E) They exclude oxygen from their tissues.
  4. Which of the following reactions would be endergonic? A) HCl ๏‚ฎ H+^ + Cl- B) C 6 H 12 O 6 + 6 O 2 ๏‚ฎ 6 CO 2 + 6 H 2 O C) ATP ๏‚ฎ ADP + Pi D) glucose + fructose ๏‚ฎ sucrose E) All of the above
  5. During aerobic respiration, electrons travel downhill in which sequence? A) food โ†’ citric acid cycle โ†’ ATP โ†’ NAD+ B) food โ†’ NADH โ†’ electron transport chain โ†’ oxygen C) glucose โ†’ pyruvate โ†’ ATP โ†’ oxygen D) glucose โ†’ ATP โ†’ electron transport chain โ†’ NADH E) food โ†’ glycolysis โ†’ citric acid cycle โ†’ NADH โ†’ ATP
  1. Your friend purified human pepsin (a digestive enzyme active in the stomach) in the lab. In a test tube with distilled water he placed the substrate (a protein that should be broken down by pepsin) and left it at room temperature for several hours. The substrate was not broken down by the enzyme. Remembering your BIO311 lecture, you suggest to him to do what with his solution? A) Increase the temperature and the pH B) Decrease the temperature and the pH C) Decrease the pH and increase the temperature D) Increase the pH and decrease the temperature E) None of the above
  2. As discovered by Calvin, when algal cells are exposed to radioactive carbon dioxide in the light for only 1 second, the FIRST STABLE compound that is most quickly and most extensively labeled with radioactive C is: A) A 6 carbon compound B) Fructose 6 phosphate C) 3 Phosphoglycerate D) Plastocyanin E) RUBISCO
  3. Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose- 6-phosphate to fructose-1,6-bisphosphate, an early step of glycolysis. In the presence of oxygen, an increase in the amount ATP in a cell would be expected to A) inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle. B) activate the enzyme and thus slow the rates of glycolysis and the citric acid cycle. C) inhibit the enzyme and thus increase the rates of glycolysis and the citric acid cycle. D) activate the enzyme and increase the rates of glycolysis and the citric acid cycle. E) inhibit the enzyme and thus increase the rate of glycolysis and the concentration of citrate.
  4. In the Calvin cycle, CO 2 is combined _____. A) with a 2-carbon compound to form a 3-carbon compound B) with a 5-carbon compound to form an unstable 6-carbon compound, which breaks down into two 3-carbon compounds C) with a 7-carbon compound to form two 4-carbon compounds D) with a 5-carbon compound to form a stable 6-carbon compound that can be converted directly to glucose E) with two 2-carbon compounds to form a 5-carbon compound
  5. Which statement describes the functioning of photosystem II?

C) The decrease in entropy associated with life must be compensated for by an increase in entropy in the environment that life occurs in. D) The entropy of the universe is constantly decreasing. E) A and D

  1. Are chemical reactions in cells at equilibrium? A) Yes B) Only exergonic reactions C) No D) Only endergonic reactions E) Yes, except for the ones coupled with ATP hydrolysis
  2. How much NET ATP and NADH are made per molecule of glucose at the end of Glycolysis? A) 2, 4 B) 2, 2 C) 4, 4 D) 4, 2 E) none of the above
  3. What is the final electron acceptor in aerobic respiration? A) CO B) O C) Acetaldehyde D) Pyruvate
  4. How much ATP is formed per molecule of Acetyl CoA at the end of Krebโ€™s cycle? A) 2 B) 4 C) 6 D) 8 E) 32
  5. In the absence of O2, pyruvate goes through: A) Citric acid cycle B) ETC C) Fermentation D) oxidation