Answer: Option E.
The stroma is analogous to the matrix of mitochondrial.
Explanation:
Chloroplast are organelles in plants and some protist that stores chlorophyii which help in photosynthesis by converting light energy to chemical energy.
Chloroplast is also called plasmid and have two membranes which contain chlorophyll. The thykaloid membranes contain enzymes that help in carbon fixation reactions. The thykaloid are arranged in stacks. The light dependent and carbon fixation occur in the chloroplast.
Option E is false about chloroplast because it has no stroma that is analogous to matrix of mitochondrial. It is an organelle on its own.
Answer :a and b.
Correct Answers.
C.Both the light-dependent (light) and carbon-fixation (dark) reactions occur in the chloroplasts.
Light reactions occurs in the thylakoid membrane of chloroplasts. Thylakoids with their membranes are arranged in stacks, called grana.(singular granum in chloroplasts) .it is this membrane that light stage of photosynthesis occurs. Enzyme(Rubisco) for Carbon fixation is present in the Stroma of the chloroplasts.Therefore Stroma is the site for dark reaction stage of photosynthesis.
D. Thylakoid are arranged in stacks like ''pile of books'' on top of one another in the chloroplast. The stacks of thylakoids are called grana, singular granum. These grana are linked together by lamellae. The arrangement ensures that maximum thylakoids are packed within small space in the chloroplasts.
E, The stroma is the fluid-filled space which continuously bath the thylakoids and the lamellae in the chloroplasts.This is similar to the matrix of mitochondria.
Wrong Answers.
A. a.The role of chloroplasts is to capture light energy.
Chloroplast contains green pigments called chlorophyll. This is the pigment s that trap sunlight through the photo systems I and II it contains. The Photosystems are made up of primary and accessory pigments.Theses are the primary light trapping mechanism of chlorophyll. Therefore the role of chlorophyll is to trap sunlight, not the role of chlorophyll.
B. The enzyme for Carbon-fixation is abundant in the stroma, where light independent reaction takes place and not in the thylakoid membrane, Therefore this is a wrong answer. Besides only light dependent stage takes place in the thylakoid membrane during chemiosmosis, therefore enzymes for carbon-fixation can not be in the thylakoid membrane.
