FREE BioInteractive Structure of Chloroplasts Questions and Answers

Question 1

What is the primary function of chloroplasts in plant cells?

Accepted Answer

Photosynthesis

Answer

The primary function of chloroplasts in plant cells is to carry out photosynthesis. These specialized organelles contain chlorophyll and other necessary components to capture light energy and convert it into chemical energy in the form of glucose.

Question 2

Which structure within the chloroplast contains chlorophyll?

Accepted Answer

Thylakoid membrane

Answer

Chlorophyll, the pigment essential for absorbing light energy during photosynthesis, is embedded within the thylakoid membranes inside the chloroplast. These membranes are the site where the light-dependent reactions occur, converting light energy into chemical energy.

Question 3

What is the stroma in a chloroplast?

Accepted Answer

The dense fluid surrounding the thylakoids

Answer

The stroma in a chloroplast is the dense, fluid-filled space that surrounds the thylakoids and grana within the inner membrane. It is the location where the light-independent reactions, or the Calvin Cycle, take place, utilizing the ATP and NADPH produced by the thylakoids to fix carbon dioxide into sugars.

Question 4

What are grana in chloroplasts?

Accepted Answer

Stacks of thylakoids

Answer

Grana (singular: granum) are stacks of thylakoids within the chloroplast. This stacked arrangement increases the surface area of the thylakoid membranes, which is crucial for maximizing the efficiency of the light-dependent reactions of photosynthesis.

Question 5

Which part of the chloroplast is responsible for the light-dependent reactions?

Accepted Answer

Thylakoid membrane

Answer

The thylakoid membrane is the part of the chloroplast responsible for the light-dependent reactions of photosynthesis. It contains the chlorophyll pigments, photosystems, and electron transport chains that capture light energy, split water, and produce ATP and NADPH.

BioInteractive - Photosynthesis BioInteractive Test Practice Test

BioInteractive - Photosynthesis BioInteractive Test Practice Test

FREE BioInteractive Structure of Chloroplasts Questions and Answers