QUESTION 1 Chloroplasts contain their own DNA and have photosynthetic pigments T

Question

QUESTION 1

Chloroplasts contain their own DNA and have photosynthetic pigments

True

False

10 points   

QUESTION 2

Plastids that make and store pigments that are not chlorophylls are called

chloroplasts

amyloplasts

chromoplasts

mitochondria

10 points   

QUESTION 3

The light dependent stage of photosynthesis uses chemical bond energy to make glucose and other carbohydrates.

True

False

10 points   

QUESTION 4

The four principle structures found in chloroplasts that play a role in photosynthesis include all of the following except

grana

lamella

stroma

thylakoids

all of the above

chloroplasts

amyloplasts

chromoplasts

mitochondria

Explanation / Answer

Answer

QUESTION 1

Chloroplasts contain their own DNA and have photosynthetic pigments - True

Chloroplast have their own DNA and synthesize chlorophyll. This chlorophyll pigment traps solar energy and conducts photosyntheis.

QUESTION 2

Plastids that make and store pigments that are not chlorophylls are called Chromoplast.

Chromoplast is a plastid that makes and stores other pigments such as yellow, organe, and red.

QUESTION 3

The light dependent stage of photosynthesis uses chemical bond energy to make glucose and other carbohydrates- False.

Dark reaction makes use of the organic molecules such as ATP and NADPH to make glucose and carbohydrates. This reaction is known as Calvin Benison cycle which occurs in stroma where ATP provides energy, while NADPH donates electrons required to convert carbon dioxide to give carbohydrate such as glucose.

QUESTION 4

Answer

Chloroplasts are special membrane bound organelles and found in mesophyll cells of the leaves. Chloroplasts are disc like structures and have Membrane, Stroma, and Thylakoids.

The chloroplasts are covered by 2 membranes. The inner membrane encloses the chloroplasts and studded with transport proteins. The inner most matrix of the chloroplasts is called Stroma. The thylakoids are sac like structures placed one above the other in stroma and the stack like structure is known as Grana. These thylakoids are interconnected by lamella.

Therefore, all these structures grana, lamella, stroma and thylakoids of chloroplast are involved in photosynthesis.

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