Nucleic Acids - Mock Test 17

Question 161

All the following statements about protooncogenes are true except?

A) They are present in human beings B) They are present in healthy cells C) Proteins encoded by them are essential D) They are expressed only when a healthy cell has been transformed into a cancer cell

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Question 162

Proto-oncogens are present in?

A) Oncoviruses B) Cancer cells C) Healthy human cells D) Prokaryotes

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Question 163

A normal cell can be transformed into a cancer cell by all of the following except?

A) Ionising radiation B) Mutagenic chemicals C) Oncogenic bacteria D) Some viruses

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Question 164

If DNA of a cancer cell is introduced into a normal cell, the recipient cell?

A) Destroys the DNA B) Loses its ability to divide C) Dies D) Changes into a cancer cell

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Question 165

A cancer cell is characterized by?

A) Uncontrolled cell division B) Invasion of neighbouring cells C) Spread to distant sites D) All of these

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Question 166

GHunter’s syndrome results from absence of?

A) Hexosaminidase A B) Iduronate sulphatase C) Neuraminidase D) Arylsulphatase B

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Question 167

Glycophorin is present in cell membranes of?

A) Erythrocytes B) Platelets C) Neutrophils D) Liver

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Question 168

Glycoproteins are marked for destruction by removal of their?

A) Oligosaccharide prosthetic group B) Sialic acid residues C) Mannose residues D) N-terminal amino acids

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Question 169

Fibronectin is involved in?

A) Cell adhension B) Cell movement C) Both 1⃣ and 2⃣ D) None of these

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Question 170

Fibronectin has binding sites for all of the following except?

A) Glycophorin B) Collagen C) Heparin D) Integrin receptor

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