Biology Lesson 4: Cellular Metabolism, Part 1

Question 1

Two types of organisms classified by how they obtain energy

Answer 1

Autotrophs (or producers: organisms that make their own food
Heterotrophs (or consumers: organisms which depend on other organisms for their food.

Question 2

Photosynthesis

Answer 2

a process by which autotrophs absorb energy from the sun and convert it to stored chemical energy

Question 3

Chloroplasts

Answer 3

the organelles found only in autotrophs which are responsible for photosynthesis

Question 4

The first part of photosynthesis

Answer 4

the light dependent stage

Question 5

Molecules called–

Answer 5

Photosystems absorb energy from the sun

Question 6

The energy from the sun splits water (H2O) in the plant into–

Answer 6

hydrogen and oxygen molecules, oxygen is then released into the air

Question 7

The remaining hydrogen ions and electrons are passed through–

Answer 7

an electron transport chain

Question 8

The results after the first part of photosynthesis are

Answer 8

ATP and NHDPH

Question 9

The second part of photosynthesis is the Calvin cycle

Answer 9

the process by which the plant procuces energy

Question 10

The Calvin cycle occurs in the stroma of the–

Answer 10

chloroplasts (the fluid-like area)

Question 11

A molecule of carbon dioxide–

Answer 11

from the air diffuses into the cell
it binds to a 5 carbon sugar making a 6 carbon molecule
this unstable 6-carbon molecule quickly splits into 3-carbon molecules