Q: Which of the following best describes the overall chemical equation for photosynthesis?

$$6CO_2 + 12H_2O + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 1

Which of the following best describes the overall chemical equation for photosynthesis?

Accepted Answer

$$6CO_2 + 12H_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6O_2$$

Question 2

Which statement correctly explains why photosynthesis is considered an endergonic reaction?

Accepted Answer

It requires an input of energy, and the products have more potential energy than the reactants.

Question 3

During the light reactions of photosynthesis, what is the primary function of the linear electron flow?

Accepted Answer

To generate ATP and NADPH for use in the Calvin cycle

Question 4

Which enzyme is responsible for the initial fixation of CO$$_2 in C$_3$$ plants, and what is a major drawback of its activity?

Accepted Answer

Rubisco; it can also bind O$$_2$$, leading to photorespiration

Question 5

How do C$$_4$$ plants minimize the effects of photorespiration?

Accepted Answer

By spatially separating carbon fixation and the Calvin cycle

Question 6

Which of the following best describes the adaptation of CAM plants to arid environments?

Accepted Answer

They open their stomata at night and temporally separate carbon fixation from the Calvin cycle.

Question 7

Which of the following is a correct comparison between mitosis and meiosis?

Accepted Answer

Mitosis produces cells for growth and repair, while meiosis produces gametes for sexual reproduction.

Question 8

During which phase of meiosis does crossing over occur, and what is its significance?

Accepted Answer

Prophase I; it increases genetic diversity by exchanging DNA between homologous chromosomes

Question 9

A cell with 8 chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after cytokinesis?

Accepted Answer

8

Question 10

Which law explains why alleles for different genes are inherited independently of each other, and during which stage of meiosis does this occur?

Accepted Answer

Law of Independent Assortment; Metaphase I

Question 11

A heterozygous plant with genotype $$Pp is $$self-fertilized. What is the expected phenotypic ratio in the F$$_2$$ generation if $$P is $$dominant to $$p$$?

Accepted Answer

3:1

Question 12

Which of the following is an example of incomplete dominance?

Accepted Answer

A cross between red and white flowers produces pink flowers.

Question 13

Which genetic phenomenon is illustrated by the ABO blood group system in humans?

Accepted Answer

Codominance

Question 14

A man with type AB blood and a woman with type O blood have a child. What are the possible blood types of their child?

Accepted Answer

A or B

Question 15

Which of the following best describes pleiotropy?

Accepted Answer

A single gene affects multiple phenotypic traits.

Question 16

In a dihybrid cross between two heterozygotes ($$YyRr 	imes YyRr$$), what is the expected phenotypic ratio in the F$$_2$$ generation?

Accepted Answer

9:3:3:1

Question 17

Which of the following is an example of polygenic inheritance?

Accepted Answer

Skin pigmentation

Question 18

A woman who is a carrier for a sex-linked recessive trait (X$$^NX$^n) $$and a man who does not have the trait (X$$^NY) $$have a son. What is the probability that their son will express the trait?

Accepted Answer

$$\frac{1}{2}$$

Question 19

Which process results in the random distribution of maternal and paternal chromosomes to gametes?

Accepted Answer

Independent assortment during metaphase I

Photosynthesis, Mitosis, Meiosis, and Mendelian Genetics: Core Concepts and Mechanisms

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