Q: Which of the following equations best represents the overall process of photosynthesis?

$$6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + \text{light energy} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \mathrm{O}_2$$

Question 1

Which of the following best describes the main function of the light reactions in photosynthesis?

Accepted Answer

To convert light energy into chemical energy stored in ATP and NADPH.

Question 2

During the Calvin Cycle, which molecule acts as the initial CO$$_2$$ acceptor?

Accepted Answer

RuBP (ribulose bisphosphate)

Question 3

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

Accepted Answer

Glucose

Question 4

A plant cell is exposed to light but deprived of water. Which process in photosynthesis will be directly affected first?

Accepted Answer

The splitting of water in the light reactions will be inhibited, reducing O$$_2$$ production.

Question 5

Which of the following correctly lists the three phases of the Calvin Cycle in order?

Accepted Answer

Carbon fixation, reduction, regeneration of RuBP

Question 6

How many turns of the Calvin Cycle are required to produce one molecule of glucose?

Accepted Answer

Six

Question 7

Which of the following equations best represents the overall process of photosynthesis?

Accepted Answer

$$6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + 	ext{light energy} ightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \mathrm{O}_2$$

Question 8

Which structure within the chloroplast is the site of the light reactions?

Accepted Answer

Thylakoid membrane

Question 9

If a plant's thylakoid membranes are damaged, which process will be most directly affected?

Accepted Answer

The light reactions, including ATP and NADPH production

Question 10

Which of the following best describes an autotroph?

Accepted Answer

An organism that produces its own food from inorganic substances

Question 11

A mutation prevents a plant from regenerating RuBP in the Calvin Cycle. What is the most likely consequence?

Accepted Answer

The plant will be unable to fix additional CO$$_2.$$

Question 12

Which of the following is a correct statement about the relationship between the light reactions and the Calvin Cycle?

Accepted Answer

The light reactions provide ATP and NADPH to power the Calvin Cycle.

Question 13

Which of the following is a direct input to the Calvin Cycle?

Accepted Answer

CO$$_2$$

Question 14

A scientist measures the rate of photosynthesis in a plant and finds that it decreases when NADP$$^+ is $$unavailable. What is the most likely explanation?

Accepted Answer

NADP$$^+ is $$required to accept electrons in the light reactions.

Question 15

Which of the following best explains why six turns of the Calvin Cycle are needed to produce one glucose molecule?

Accepted Answer

Each turn fixes one carbon atom, and glucose has six carbons.

Question 16

Which of the following is a correct sequence of events in the light reactions?

Accepted Answer

Absorption of light by chlorophyll, splitting of water, production of ATP and NADPH

Question 17

A plant is placed in an environment with no CO$$_2. $$Which process will be directly inhibited?

Accepted Answer

The Calvin Cycle

Question 18

Which of the following best describes the role of chlorophyll in photosynthesis?

Accepted Answer

It absorbs light energy to drive the light reactions.

Question 19

Which of the following is a correct description of a heterotroph?

Accepted Answer

An organism that obtains energy by consuming other organisms.

Question 20

If a plant is exposed to light but lacks NADP$$^+$$, which of the following will most likely occur?

Accepted Answer

The light reactions will stop because electrons cannot be accepted.

Photosynthesis and the Calvin Cycle: Key Concepts and Processes End of CH 8 need to know

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드