Biology ยท Chemistry

Lipids, Fats, and Biochemistry

1,009 Questions

Lipids, fats, and biochemistry explore the structure and function of biological molecules. This includes fatty acids, cholesterol, trans-fats, and cellular membranes. Questions on this topic frequently appear in science sections of competitive government exams.

Types of fats and lipidsCholesterol and human bodyFatty acidsCellular membranes

Lipids, Fats, and Biochemistry Questions

Multiple choice

Which coenzyme is required for the dehydrogenation step in the beta-oxidation pathway?

  1. NADH

  2. FAD

  3. CoQ10

  4. ATP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

FAD (flavin adenine dinucleotide) is the coenzyme required for the dehydrogenation step in the beta-oxidation pathway, accepting electrons from acyl-CoA and transferring them to the electron transport chain.

Multiple choice

What is the name of the enzyme that catalyzes the hydration step in the beta-oxidation pathway?

  1. Enoyl-CoA hydratase

  2. 3-Hydroxyacyl-CoA dehydrogenase

  3. Thiolase

  4. Citrate synthase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Enoyl-CoA hydratase is the enzyme responsible for catalyzing the hydration step in the beta-oxidation pathway, adding a water molecule to enoyl-CoA to form 3-hydroxyacyl-CoA.

Multiple choice

Which coenzyme is required for the hydration step in the beta-oxidation pathway?

  1. NADH

  2. FAD

  3. CoQ10

  4. H2O
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water is the coenzyme required for the hydration step in the beta-oxidation pathway, adding a hydroxyl group to the double bond of enoyl-CoA.

Multiple choice

What is the name of the enzyme that catalyzes the cleavage step in the beta-oxidation pathway?

  1. Thiolase

  2. Acyl-CoA dehydrogenase

  3. Enoyl-CoA hydratase

  4. 3-Hydroxyacyl-CoA dehydrogenase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Thiolase is the enzyme responsible for catalyzing the cleavage step in the beta-oxidation pathway, breaking down 3-hydroxyacyl-CoA into acetyl-CoA and a new acyl-CoA molecule.