Question 1

During photosynthesis in plants, where does the light-dependent reaction primarily take place?

Accepted Answer

In the thylakoid membranes of the chloroplast

Question 2

Which of the following best describes the main function of stomata in plant leaves?

Accepted Answer

Regulating gas exchange and water loss

Question 3

What is the correct sequence of events during the M phase of the cell cycle?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase, Cytokinesis

Question 4

Which of the following is a key difference between C3 and C4 photosynthetic pathways?

Accepted Answer

C4 plants initially fix CO$$_2$$ into a four-carbon compound, while C3 plants fix CO$$_2$$ into a three-carbon compound.

Question 5

A child inherits an X-linked recessive disorder. Which of the following is most likely true about the child's parents?

Accepted Answer

The mother is a carrier and the father is unaffected.

Question 6

Which law of thermodynamics states that energy cannot be created or destroyed, only transformed?

Accepted Answer

The first law of thermodynamics

Question 7

During meiosis, what is the main outcome of nondisjunction?

Accepted Answer

Gametes with abnormal numbers of chromosomes

Question 8

Which of the following best explains the difference between homologous chromosomes and sister chromatids?

Accepted Answer

Sister chromatids are identical copies formed by DNA replication, while homologous chromosomes are similar but not identical chromosomes inherited from each parent.

Question 9

A geneticist observes that a certain trait does not follow typical Mendelian inheritance patterns and is only expressed when inherited from the mother. What is the most likely explanation?

Accepted Answer

The trait is due to genomic imprinting.

Question 10

Which of the following best describes the process and outcome of crossing over during meiosis I?

Accepted Answer

Exchange of genetic material between homologous chromosomes, increasing genetic diversity

Question 11

Which of the following is the ultimate source of energy for most living things on Earth?

Accepted Answer

The Sun

Question 12

A woman with genotype AaBb (where A and B are unlinked genes) is crossed with a man with genotype aabb. What is the probability that their child will have the genotype AaBb?

Accepted Answer

$$\frac{1}{4}$$

Question 13

Which of the following best describes the difference between phenotype and genotype?

Accepted Answer

Phenotype is the observable trait, while genotype is the genetic makeup.

Question 14

Which of the following is true about the Calvin cycle in photosynthesis?

Accepted Answer

It uses CO$$_2$$, ATP, and NADPH to produce glucose.

Question 15

What is the main difference between mitosis and meiosis?

Accepted Answer

Mitosis produces two identical diploid cells, while meiosis produces four genetically unique haploid cells.

Question 16

A male fruit fly with white eyes (X$$^wY) is $$crossed with a female with red eyes (X$$^WX$^w). $$What proportion of their male offspring will have white eyes?

Accepted Answer

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

Question 17

Which of the following best describes the function of electron carriers in cellular respiration?

Accepted Answer

They transport electrons to the electron transport chain, facilitating ATP production.

Question 18

Which of the following is an example of a condition that does NOT obey typical Mendelian genetics?

Accepted Answer

Genomic imprinting

Question 19

What is the main difference between an autosomal and a sex-linked disorder?

Accepted Answer

Sex-linked disorders are associated with genes on the sex chromosomes, while autosomal disorders are associated with genes on non-sex chromosomes.

Question 20

Which of the following best explains the concept of independent assortment?

Accepted Answer

Alleles of different genes assort independently of one another during gamete formation.

General Biology: Photosynthesis, Cell Cycle, Genetics, and Inheritance Study Guide

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