PHOTOSYNTHESIS: The Chemical Basis of Life

Question 1

Light has the characteristics of both a

Answer 1

wave and a particle.

Question 2

characterized by wavelength (λ) and frequency (v)

Answer 2

Wave

Question 3

distance between 2 wave crests

Answer 3

Wavelength (λ)

Question 4

number of wave crests that pass through a given distance at
the speed of light (c)

Answer 4

Frequency (v)

Question 5

light particle each of which contain an amount of energy called quantum

Answer 5

Photon

Question 6

where h is Planck’s constant (6.626 × 10–34 J s)

Answer 6

Planck’s Law

Question 7

Site of Photosynthesis

Answer 7

Chloroplast

Question 8

Most of the thylakoids appear to be very closely associated with each other forming the stacked membranes of

Answer 8

grana lamellae

Question 9

the exposed membranes in which stacking is absent are known as

Answer 9

stroma lamellae

Question 10

absorbs light primarily in the blue and red regions of the visible
spectrum.

Answer 10

Chlorophyll

Question 11

yellow to orange photosynthetic pigments absorb wavelengths of light
different from those absorbed by chlorophyll, thereby expanding the spectrum of light
that provides energy for photosynthesis.

Answer 11

Carotenoids

Question 12

The principal raw materials for photosynthesis are water and carbon dioxide

Answer 12

Photosynthesis

Question 13

begin as chlorophyll absorbs light energy, which causes
one of its electrons to move to a higher energy state

Answer 13

Light Dependent Reaction

Question 14

CO2 and water from the environment are enzymatically combined
with a five-carbon acceptor molecule to generate two molecules of a three-carbon intermediate.

Answer 14

CALVIN CYCLE

Question 15

First, a key enzyme, rubisco, combines a molecule of CO2 with RuBP

Answer 15

CO2 uptake

Question 16

The PGA molecules are then converted to glyceraldehyde-3- phosphate (G3P) using NADPH and ATP.

Answer 16

Carbon reduction

Question 17

Note that although 2 of the 12 G3P molecules formed during six turns of the cycle were removed from the cycle, 10 G3Ps remain, containing 30 carbon atoms in all.

Answer 17

RuBP regeneration

Question 18

Factors that Regulates the Process (6)

Answer 18

1. Light intensity and Temperature
2. Water
3. Carbon Dioxide
4. Mineral
5. Energy Efficiency
6. Enzymes of Light dependent reaction regulates Calvin Cycle

Question 19

There are times when the CO2 in the stroma depletes in number

Answer 19

Photorespiration