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Chapter Exam

Question 1

What useful product is formed after six turns of the Calvin cycle?

	A) ATP
	B) NADPH
	C) glucose
	D) AMP

Question 2

During chemiosmosis, the energy that converts a molecule of ADP to ATP comes from ___________________.

	A) a proton escaping the thylakoid vesicle.
	B) a proton entering the thylakoid vesicle.
	C) AMPD.
	D) NADPH.

Question 3

The energy needed to attach hydrogen atoms to carbon to form carbon-chain molecules comes from _____________.

	A) ATP.
	B) DNA.
	C) NADPH.
	D) NAD.

Question 4

The stage of cellular respiration that does not require oxygen is_____________.

	A) the Calvin cycle.
	B) the Krebs cycle.
	C) photorespiration.
	D) glycolysis.

Question 5

The total number of ATP produced from the breakdown of a glucose molecule by glycolysis and oxidation is_________________.

	A) 2.
	B) 18.
	C) 34.
	D) 36.

Question 6

Plants need light to use ATP to synthesize plant molecules from CO2 in the air.

	A) True
	B) False

Question 7

In leaves, chlorophyll a and chlorophyll b are the only pigments capable of capturing energy from light.

	A) True
	B) False

Question 8

"Oxygen debt" occurs when plants produce oxygen during photosynthesis faster than it can be released from the plant.

	A) True
	B) False

Question 9

During fermentation, yeast adds extracted electrons to acetaldehyde to form ethanol.

	A) True
	B) False

Question 10

The carbon atoms from a completely oxidized glucose molecule become part of carbon dioxide.

	A) True
	B) False

Question 11

The stripping of electrons from food molecules is oxidation.

	A) True
	B) False

Question 12

About 25% of the radiant energy from the sun that reaches the earth each day is captured by photosynthesis.

	A) True
	B) False

Question 13

Plants use chlorophyll to absorb primarily the green band of the visible spectrum.

	A) True
	B) False

Question 14

The step that occurs before respiration takes place is called fermentation.

	A) True
	B) False

Question 15

It is a spectacular fall day in New England. The leaves are red, orange, and yellow. The reason for this incredible display of color is______________.

	A) the frost causes the chlorophyll to change color.
	B) plants do not produce chlorophyll in the cool weather so it no longer masks the carotenoid pigments.
	C) the cool temperatures cause the chlorophyll and carotenoid pigments to react with each other forming new pigment colors.
	D) rhodoposin pigments are manufactured in the cooler temperatures and mask the chlorophyll pigments.
	E) as the leaves die proteins in their cells change to the variety of colors typical of a fall day in New England.

Question 16

_________ is the end product of glycolysis. It is oxidized into ___________ which then enters the Krebs cycle.

	A) NADH, pyruvate
	B) Pyruvate, NADH
	C) Acetyl-CoA, pyruvate
	D) Pyruvate, acetyl-CoA
	E) CO₂, NADPH

Question 17

Common end-products of fermentation include:

	A) Glucose
	B) Ethanol
	C) Lactate
	D) Pyruvate
	E) B & C

Question 18

In mitochondria the Krebs cycle takes place in___________________.

	A) the outermost membrane.
	B) the matrix.
	C) pores located throughout the inner membrane.
	D) all parts of the organelle.
	E) The Krebs cycle does not occur in mitochondria.

Question 19

In plants photosynthesis occurs in the_________________.

	A) central vacuole of most cells.
	B) cell wall.
	C) leaves only.
	D) chloroplasts.
	E) vascular tissue.

Question 20

In a high school biology class, students observe that plants grown with a green filter in front of the light source grow better than plants with a red filter in front of the light source. Why is this?

	A) plants do not absorb the red wavelengths of light for photosynthesis.
	B) plants do not absorb the green wavelengths of light for photosynthesis.
	C) plants reflect the red wavelengths of light during photosynthesis.
	D) plants cannot reflect light during photosynthesis.
	E) both a and b