FREE AND STUDY GAMES ABOUT

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FREE AND STUDY GAMES ABOUT

EGSCBIOLOGYQUIZ3CONT EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -83 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The enzyme ____ and its cofactor NAD separate electrons from hydrogen atoms

Answer:

dehydrogenase Question 2: In an experiment, a mouse breathed radioactively labeled oxygen. Which molecule would the labeled oxygen first show up in?

Answer:

H2O

Question 3: What is likely the origin of chloroplasts?

Answer:

photosynthetic prokaryotes that lived inside eukaryotic cells Question 4: Molecules spreading out to form a solution in dynamic equilibrium is an example of

Answer:

diffusion, the 2nd law of thermodynamics, a system gaining entropy, a system gaining in disorder

Question 5: In photophosphorylation, energy from electron flow is used to transport ___ from the ___ to the thylakoid compartment, generating a concentration gradient of _____.

Answer:

H+...stroma...H+ Question 6: What has been a major source of ozone destruction over the past 50 years?

Answer:

chlorofluorocarbons Question 7: Energy is contained in ____ bound up in covalent bonds in organic compounds.

Answer:

electrons

Question 8: Plants use sugars as

Answer:

a fuel for cellular respiration and a starting material for making other organic molecules

Question 9: Photophosphorylation differs from oxidative phosphoylation in that

Answer:

the final electron acceptor is NADP+ and not oxygen

Question 10: Photoautotrophs produce

Answer:

organic molecules from inorganic molecules

Question 11: How do the reaction centers of photosystem I and II differ?

Answer:

Each preferentially absorbs slightly different wavelengths of light Question 12: The full range of electromagnetic energy is called the _____ spectrum.

Answer:

electromagnetic

Question 13: True or False: Burning wood contributes more to acid rain than burning fossil fuels.

Answer:

False Question 14: In cellular respiration, what product of glycolysis enters the mitochondrion?

Answer:

pyruvate Question 15: A normal process of photosynthesis that could not occur if all reaction centers were inactivated by a toxin is

Answer:

the donation of excited electrons by chlorophyll a to a primary electron acceptor Question 16: True or False: ATP is not produced during photosynthesis, but only during respiration.

Answer:

False

Question 17: Photorespiration is

Answer:

an evolutionary relic from when atmospheric O2 levels were low and did not interfere with rubisco

Question 18: When does carbon fixation occur?

Answer:

When carbon and oxygen from CO2 are incorporated into an organic molecule

Question 19: Ozone

Answer:

protects Earth from UV radiation Question 20: For the average adult, maintenance (such as heart dumping, breathing, maintaining body temp, food digestion) require approx __ calories per day.

Answer:

2200

Question 21: A packet of light energy is called a

Answer:

photon Question 22: The conversion of CO2 and H2O into organic compounds using energy from light is called

Answer:

photosynthesis Question 23: Which molecule stores the most potential energy in its chemical bonds?

Answer:

Glucose

Question 24: Photosynthetic organisms derive their carbon from

Answer:

carbon dioxide Question 25: The electrons lost from the reaction center of photosystem II are replaced by electrons from

Answer:

H2O

Question 26: Clusters of light gathering pigments in a photosystem pass

Answer:

energy to the reaction center Question 27: What is the source of energy that provides the boost for electrons during photosynthesis?

Answer:

light Question 28: If you consume 1 gram of fat, glucose, sucrose, protein, and starch, which will yield the most ATP?

Answer:

fat