Question 1

Which statement best describes the difference between sexual and asexual reproduction?

Accepted Answer

Sexual reproduction involves two parents contributing genes to produce genetically unique offspring, while asexual reproduction involves one parent producing genetically identical offspring.

Question 2

According to Virchow’s Principle, which of the following is true?

Accepted Answer

Cells arise only from other living cells.

Question 3

Which process is responsible for cell division in prokaryotes such as E. coli?

Accepted Answer

Binary fission

Question 4

A human cell contains approximately 2 meters of DNA. If the human body has $$10^{14}$$ cells, what is the total length of DNA in the human body?

Accepted Answer

$$2 	imes 10$$^{14}$$ meters

Question 5

Which of the following is a key structural difference between prokaryotic and eukaryotic chromosomes?

Accepted Answer

Prokaryotic chromosomes are circular and lack histones, while eukaryotic chromosomes are linear and associated with histones.

Question 6

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 7

If a cell spends 6 hours in G$$_1$$, 10 hours in S, 5 hours in G$$_2$$, and 1 hour in M phase, what is the total duration of one cell cycle?

Accepted Answer

21 hours

Question 8

Which event occurs during metaphase of mitosis?

Accepted Answer

Sister chromatids align at the metaphase plate.

Question 9

Loss of cell cycle control can lead to which of the following conditions?

Accepted Answer

Cancer

Question 10

Which term describes a cell with two copies of each chromosome?

Accepted Answer

Diploid

Question 11

What is the main advantage of sexual reproduction over asexual reproduction?

Accepted Answer

It allows for greater genetic variation among offspring.

Question 12

Which mechanism does NOT contribute to genetic variation during sexual reproduction?

Accepted Answer

Binary fission

Question 13

During meiosis, when do homologous chromosomes separate?

Accepted Answer

Anaphase I

Question 14

Which of the following best describes crossing over?

Accepted Answer

The exchange of genetic material between homologous chromosomes during meiosis.

Question 15

If a somatic cell in humans contains 46 chromosomes, how many chromosomes will a gamete contain after meiosis?

Accepted Answer

23

Question 16

Which phase of mitosis is characterized by the reappearance of nuclear membranes and relaxation of chromosomes?

Accepted Answer

Telophase

Question 17

Which of the following is true about autosomes?

Accepted Answer

They are chromosomes present in both sexes and do not determine sex.

Question 18

Which process ensures that each gamete contains a random mix of maternal and paternal chromosomes?

Accepted Answer

Independent assortment

Question 19

A mutation disrupts the cell cycle control system, causing cells to divide uncontrollably. What is the most likely outcome?

Accepted Answer

Development of cancer

Question 20

Which of the following best explains why all your DNA could travel between the Earth and Sun 1337 times?

Accepted Answer

The total length of DNA in the human body is enormous due to the large number of cells.

The Cellular Basis of Reproduction and Inheritance

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