BECE Photosynthesis and Ecosystems 2

Question 1

Which part of the chloroplast is the primary site of the light-dependent reactions of photosynthesis?

Accepted Answer

Thylakoid membrane

Answer

Stroma

Answer

Outer membrane

Answer

Intermembrane space

Question 2

What gas is released as a byproduct of the light-dependent reactions in photosynthesis?

Accepted Answer

Oxygen

Answer

Carbon dioxide

Answer

Nitrogen

Answer

Hydrogen

Question 3

In a food chain, which organism converts solar energy into chemical energy?

Accepted Answer

Producer

Answer

Herbivore

Answer

Carnivore

Answer

Decomposer

Question 4

A hawk eats a snake that ate a frog that ate a grasshopper that ate grass. The hawk is at which trophic level?

Accepted Answer

Fifth

Answer

Second

Answer

Third

Answer

Fourth

Question 5

Which pigment in plants absorbs light energy most efficiently for photosynthesis?

Accepted Answer

Chlorophyll

Answer

Xanthophyll

Answer

Carotenoid

Answer

Anthocyanin

Question 6

What is the role of NADPH produced during the light reactions of photosynthesis?

Accepted Answer

It carries electrons to the Calvin cycle

Answer

It splits water molecules

Answer

It pumps protons across the membrane

Answer

It absorbs sunlight directly

Question 7

Which of the following best describes a 'niche' in an ecosystem?

Accepted Answer

The total role an organism plays including what it eats and how it interacts

Answer

The physical location where an organism lives

Answer

The number of organisms in a population

Answer

The geographic range of a species