NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Select all that are true:If chloroplasts did not exist,
A
plant growth would speed up
B
animals would die
C
evolution of homo sapiens would be delayed
D
oxygen never would have existed
Explanation: 

Detailed explanation-1: -Chloroplasts contain chlorophyll and which traps sunlight and helps in photosynthesis. If there would be no chlorophyll, there will be no food, and hence no life.

Detailed explanation-2: -Chloroplasts are plastids which are responsible for photosynthesis. They are double-membraned, have their own genetic material and contain the green pigment chlorophyll. The mitochondrion is the major site for ATP synthesis and leucoplasts are plastids which are responsible for the storage of fat.

Detailed explanation-3: -The membrane-bound matrix of chloroplasts is stroma and within the stroma, thylakoids are present that are a kind of grana. Hence, Both chloroplast and mitochondria have an interior compartment, the thylakoid membrane is that the wrong statement.

Detailed explanation-4: -Chloroplasts contain their own genome, which is separate from the DNA of the plant cell. Chloroplasts contain multiple copies of circular pieces of DNA called plasmids. These plasmids carry about 120 genes. The chloroplast makes 10 percent of the proteins that it needs to do its work.

There is 1 question to complete.