Biochemistry - Mock Test 24

Question 231

The catalytic efficiency of two different enzymes can be compared by the

A) formation of the product B) pH optimum value C) Kₘ value D) molecular size of the enzyme

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Question 232

Collagen is

A) fibrous protein B) globular protein C) lipid D) carbohydrate

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Question 233

Lipids are insoluble in water because lipid molecules are

A) hydrophilic B) hydrophobic C) neutral D) zwitter ions

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Question 234

Which is an essential amino acid

A) Serine B) Aspartic acid C) glycine D) Valine

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Question 235

Feedback inhibition of an enzymatic reaction is caused by

A) end product B) substrate C) enzyme D) rise in temperature

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Question 236

Length of one turn of the helix in a____form DNA is approximately

A) 3.4 nm B) 2 nm C) 0.34 nm D) 20 nm

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Question 237

The secondary structure of that portion of an integral protein that is buried in the lipid bilayer of a cell membrane is

A) -strand B) -bend C) random coil D) -helix

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Question 238

Lactose is composed of

A) Glucose + Glucose B) Glucose + Fructose C) Fructose + Galactose D) Glucose + Galactose

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Question 239

The enormous diversity of protein molecules is due mainly to the diversity of

A) amino groups on the amino acids B) R groups on the amino acids C) amino acid sequences within the protein molecule D) peptide bonds

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Question 240

DNA synthesis can be specifically measured by estimating the incorporation of radiolabelled

A) uracil B) adenine C) thymidine D) deoxyribose sugar

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