Biology Test Plant Biology 2

Question 1

Which organelle is unique to plant cells and is responsible for photosynthesis?

Accepted Answer

Chloroplast

Answer

Chloroplasts contain chlorophyll and are the sites of photosynthesis, converting light energy into chemical energy.

Question 2

What type of vascular tissue transports water and minerals from roots to leaves?

Accepted Answer

Xylem

Answer

Xylem transports water and dissolved minerals upward from roots through the stem to leaves.

Question 3

Which plant hormone is primarily responsible for fruit ripening?

Accepted Answer

Ethylene

Answer

Ethylene is a gaseous hormone that triggers fruit ripening, leaf abscission, and other senescence processes.

Question 4

What is the term for the movement of water across a semipermeable membrane from low to high solute concentration?

Accepted Answer

Osmosis

Answer

Osmosis is the passive movement of water molecules across a semipermeable membrane toward higher solute concentration.

Question 5

In C4 plants, where does initial CO2 fixation occur?

Accepted Answer

Mesophyll cells

Answer

In C4 plants, CO2 is initially fixed in mesophyll cells into a 4-carbon compound before being transferred to bundle sheath cells for the Calvin cycle.

Biology Practice Test

Biology Practice Test

Biology Test Plant Biology 2