Question 1

Which statement best describes the First Law of Thermodynamics as it applies to biological systems?

Accepted Answer

The energy of the universe is constant.

Question 2

A process with a positive $$\Delta G is $$best described as:

Accepted Answer

An endergonic process that is not spontaneous and requires energy input.

Question 3

Which of the following statements about the oxidation of palmitate compared to glucose is correct?

Accepted Answer

The oxidation of one mole of palmitate yields more energy than the oxidation of one mole of glucose.

Question 4

Which of the following is NOT true about thermodynamic coupling in cells?

Accepted Answer

ATP hydrolysis can be used to make ANY endergonic process occur.

Question 5

Enzymes accelerate reaction rates by:

Accepted Answer

Decreasing the $$E_A ($$activation energy) for the reaction.

Question 6

Which of the following is NOT true of enzymes?

Accepted Answer

Enzyme activity is directly proportional to the concentration of substrate molecules.

Question 7

You discover that the uncontrolled expression of enzyme X is involved in cancer progression. Which of the following would be a possible target for drug development?

Accepted Answer

All the above are possible targets for drug development.

Question 8

Which of the following is NOT a product of the light-dependent reactions of photosynthesis?

Accepted Answer

CO$$_2$$

Question 9

In photosynthetic electron transport, where do protons become concentrated in the chloroplast?

Accepted Answer

Thylakoid space

Question 10

Which color(s) of light should you bring to a space station to maximize photosynthetic oxygen production?

Accepted Answer

Red and blue

Question 11

Which of the following is NOT true of NAD$$^+/$$NADH?

Accepted Answer

NADH donates electrons to O$$_2 in $$one highly exergonic reaction.

Question 12

In the combustion of methane, CH$$_4 is $$converted to CO$$_2. In $$this reaction, the carbon atom has:

Accepted Answer

Become oxidized

Question 13

Which of the following is true of mitochondrial electron transport?

Accepted Answer

All the statements above are true.

Question 14

In mitochondrial electron transport, protons are pumped from the:

Accepted Answer

Matrix to intermembrane space

Question 15

Which of the following is NOT true of oxidative phosphorylation?

Accepted Answer

Electron flow from NADH and FADH$$_2$$ result in the same number of H$$^+$$ pumped.

Question 16

Which of the following is true of energy transformations in the ecosystem?

Accepted Answer

All the above

Question 17

In a solution of salt, sodium gives up an electron to form Na$$^+$$ and chlorine accepts an electron to form Cl$$^-. $$Which of the following is NOT true?

Accepted Answer

Chlorine is the reducing agent

Question 18

In the absence of oxygen, what is true about glucose breakdown in human muscle cells?

Accepted Answer

It can be partly broken down yielding a small amount of ATP.

Question 19

Both cellular respiration and photosynthesis require electron transport chains to finalize the production of ATP molecules.

Accepted Answer

True

Question 20

In chloroplast electron transport, protons are pumped from the:

Accepted Answer

Stroma to thylakoid space

Thermodynamics, Enzymes, and Bioenergetics in Biology: Step-by-Step Study Guidance

Study Guide - Practice Questions

Study Guide - Flashcards