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Biology: Concepts and Applications

Cecie Starr, Christine A. Evers, Lisa Starr

Chapter 6

Where It Starts-Photosynthesis - all with Video Answers

Educators

Chapter Questions

01:12

Problem 1

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

Prashant Bana
Prashant Bana
Numerade Educator
01:00

Problem 2

Photosynthetic autotrophs use _____ from the air as a carbon source and _____ as their energy source.

Prashant Bana
Prashant Bana
Numerade Educator
00:52

Problem 3

Chlorophyll $a$ appears green because it absorbs mainly ______ light.
a. violet and red
b. green
c. yellow
d. blue

Christina Sorrentino
Christina Sorrentino
Numerade Educator
01:02

Problem 4

Light-dependent reactions in plants proceed in the ______.
a. thylakoid membrane
b. plasma membrane
c. stroma
d. cytoplasm

Christina Sorrentino
Christina Sorrentino
Numerade Educator
01:17

Problem 5

When a photosystem absorbs light ______.
a. sugar phosphates are produced
b.electrons are transferred to ATP
c. RuBP accepts electrons
d.electrons are ejected from its special pair

Aditya Sood
Aditya Sood
Numerade Educator
01:07

Problem 6

In the light-dependent reactions, ______.
a. carbon dioxide is fixed
b. ATP forms
c. sugars form
d. $\mathrm{CO}_{2}$ accepts electrons
e. b and c
f. a and c

Christina Sorrentino
Christina Sorrentino
Numerade Educator
00:58

Problem 7

What accumulates inside the thylakoid compartment during the light-dependent reactions?
a. glucose
b. hydrogen ions
c. $\mathrm{O}_{2}$
d. $\mathrm{CO}_{2}$

Christina Sorrentino
Christina Sorrentino
Numerade Educator
01:39

Problem 8

Light-independent reactions in plants proceed in the _____.
a. thylakoid membrane
b. plasma membrane
c. stroma
d. cytoplasm

Christina Sorrentino
Christina Sorrentino
Numerade Educator
00:31

Problem 9

The Calvin-Benson cycle starts when ______.
a. light is available
b.carbon dioxide is attached to RuBP
c. electrons leave a photosystem II

Aditya Sood
Aditya Sood
Numerade Educator
00:51

Problem 10

Which of the following substances does not participate in the Calvin-Benson cycle?
a. ATP
b. NADPH
c. RuBP
d. PGAL
e. $\mathrm{O}_{2}$
f. $\mathrm{CO}_{2}$

Aditya Sood
Aditya Sood
Numerade Educator
01:05

Problem 11

In the light-independent reactions, ______.
a. carbon dioxide is fixed
b. ATP forms
c. sugars form
d. $\mathrm{CO}_{2}$ accepts electrons
e. b and c
f. a and c

Christina Sorrentino
Christina Sorrentino
Numerade Educator
02:50

Problem 12

Match each with its most suitable description.
______PGAL formation
______$\mathrm{CO}_{2}$ fixation
______photolysis
______ATP forms; NADPH does not
______photorespiration
______photosynthesis
______pigment
______autotroph
a. absorbs light
b. converts light to chemical energy
c. self-feeder
d. electrons cycle back to photosystem I
e. problem in $\mathrm{C} 3$ plants
f. ATP, NADPH required
g. water molecules split
h. rubisco function

Aditya Sood
Aditya Sood
Numerade Educator