BS Bachelor of Science: Life, Physical, and Chemical 2

Question 1

Which organelle is responsible for producing ATP through cellular respiration in eukaryotic cells?

Accepted Answer

Mitochondria

Answer

Mitochondria generate ATP via oxidative phosphorylation during cellular respiration.

Question 2

What is the primary product of the light-dependent reactions of photosynthesis?

Accepted Answer

ATP and NADPH

Answer

The light-dependent reactions produce ATP and NADPH, which power the Calvin cycle.

Question 3

Which type of bond holds the two strands of a DNA double helix together?

Accepted Answer

Hydrogen bonds

Answer

Hydrogen bonds between complementary base pairs (A-T and G-C) hold the two DNA strands together.

Question 4

During meiosis, genetic variation is increased by which process that exchanges segments between homologous chromosomes?

Accepted Answer

Crossing over

Answer

Crossing over during prophase I of meiosis shuffles genetic material between homologous chromosomes.

Question 5

Which macromolecule serves as both a structural component and an enzyme in living organisms?

Accepted Answer

Proteins

Answer

Proteins function as enzymes (biological catalysts) and structural components such as collagen and keratin.

BS - Bachelor of Science Practice Test