Question 1

Which of the following statements best describes the role of methylation of CpG islands near or close to the promoter region in gene regulation?

Accepted Answer

It results in silencing of transcription.

Question 2

Which of the following is NOT a function of the placenta in mammals?

Accepted Answer

Production of sperm cells

Question 3

During limb development, which structure stimulates proliferation of the mesenchyme and powerful tissue growth?

Accepted Answer

Apical Ectodermal Ridge

Question 4

Which of the following statements about histone modification is correct?

Accepted Answer

Acetylation leads to activation of transcription.

Question 5

Which organ does NOT contain neural crest-derived cells?

Accepted Answer

Liver

Question 6

Which of the following is a function of microRNAs (miRNAs) in eukaryotic cells?

Accepted Answer

They bind to complementary mRNA sequences to inhibit translation.

Question 7

Which statement about cadherins is correct?

Accepted Answer

They are calcium-dependent proteins.

Question 8

Which of the following is true about the poly-A tail of mRNA?

Accepted Answer

It increases mRNA stability and translation efficiency.

Question 9

Which of the following statements about the function of the acrosome in mammalian sperm is correct?

Accepted Answer

It contains enzymes that digest the zona pellucida surrounding the egg.

Question 10

Which of the following statements about the lateral plate mesoderm is correct?

Accepted Answer

It gives rise to most of the heart.

Question 11

Which of the following is a correct description of enhancers?

Accepted Answer

They are DNA sequences that activate gene expression.

Question 12

Which of the following statements about silencer elements is correct?

Accepted Answer

They are DNA sequences that inhibit gene expression.

Question 13

Which of the following is NOT a function of transcription factors?

Accepted Answer

They catalyze the formation of peptide bonds during translation.

Question 14

Which of the following statements about the process of gastrulation is correct?

Accepted Answer

Gastrulation starts at the animal pole of the embryo in most species.

Question 15

Which of the following statements about totipotent stem cells is correct?

Accepted Answer

They can give rise to all embryonic and extraembryonic tissues.

Question 16

Which of the following is a correct statement about the function of the homeotic selector genes in Drosophila?

Accepted Answer

They regulate the expression of genes that specify body segments.

Question 17

Which of the following statements about the role of the acrosome reaction in fertilization is correct?

Accepted Answer

It allows sperm to penetrate the zona pellucida of the egg.

Question 18

Which of the following statements about the function of the promoter in gene expression is correct?

Accepted Answer

It is required for binding of the RNA polymerase.

Question 19

Which of the following statements about the process of meiosis is correct?

Accepted Answer

Meiosis results in haploid gametes with half the chromosome number of somatic cells.

Question 20

Which of the following statements about the function of the neural tube in vertebrate development is correct?

Accepted Answer

It gives rise to the central nervous system.

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