BIO 1511 - Ch 6. Self Assessment

autotroph: weed; heterotrophs: cat, bird, caterpillar

A cat eats a bird, which ate a caterpillar that chewed on a weed. Which of these organisms are autotrophs? Which ones are heterotrophs

sunlight

Plants use as an energy source to drive photosynthesis.

thylakoid membrane

In plants, photosynthetic eukaryotes, and cyanobacteria, the light-dependent reactions proceed in/at the

the atmosphere

Most of the carbon that land plants use for photosynthesis comes from .

Chlorophyll is green because it absorbs green light.

Which of the following statements is incorrect?

1. Pigments absorb light of certain wavelengths only.

2. Some accessory pigments are antioxidants.

3. Chlorophyll is green because it absorbs green light.

electrons are ejected from its special pair

When a photosystem absorbs light energy, ______.

ATP forms

In the light-dependent reactions, _____.

Hydrogen ions

In the light-dependent reactions, what accumulates in the thylakoid compartment of chloroplasts?

Water

The atoms in the oxygen molecules released during photosynthesis come from

stroma

In chloroplasts, the light-independent reactions proceed at/in the

carbon fixation

The Calvin–Benson cycle starts with _____

O2

2. Which of the following substances does not participate in the Calvin–Benson cycle?

   1. ATP

   2. O2

   3. NADPH

   4. RuBP

   5. PGAL

   6. CO2

Limited gas exchange

Closed stomata _____

photorespiration

In C3 plants, makes sugar production inefficient when stomata close on hot, dry days

calvin-benson cycle product

PGAL formation

rubisco function

CO2 fixation

self-feeder

autotroph

electrons cycle back to photosystem I

ATP forms: NADPH does not

problem in C3 plants

photorespiration

converts light to chemical energy

photosynthesis

absorbs light

pigment

water molecules split

photolysis in photosynthesis