Chapter 8 Test

What action contributes to the inside of the thylakoid membrane becoming positively charged during the light dependent reactions? a) H+ ions are released as water splits b) ATP synthesis allows H+ ions to pass through the membrane c) ATP synthase produces ATP from ADP d) Carbon dioxide builds up in the stroma

a) H+ Ions are released as water splits

Organisms, such as plants, that make their own food are called a) autotrophs b) heterotrophs c) thylakoids d) pigments

a) autotrophs

What is the role of NADP+ in photosynthesis? a) electron carrier b) high-energy sugar c) photosystem d) pigment

a) electron carrier

THe calvin cycle is another name for the a) light-independent reactions b) light-dependent reactions c) photosynthesis reactions d) electron transport chain

a) light-independent reactions

A student is collecting the gas give off from a plant in bright sunlight at a temperature of 27 degrees celcius . The gas being collected is probably a) oxygen b) carbon dioxide c) ATP d) glucose

a) oxygen

Plants gather energy with light-absorbing molecules called a) pigments b) thylakoids c) chloroplasts d) glucose

a) pigments

What happens when chlorophyll is struck by sunlight? a) the electrons in the chlorophyll molecule become energized b) the chlorophyll molecule is broken into two parts c) A chemical reaction turns chlorophyll into high energy carbohydrate d) Energy from fat molecules is released

a) the electrons in the chlorophyll

What makes certain molecules good electron carriers? a) they can accept electrons and transfer most of their energy to another molecule b) they are very large molecules, so they have lots of room to carry many electrons c) The can absorb sunlight, which is where all of the high-energy electrons come from d) They are carbohydrates and have a lot of energy, which allows them to carry electrons

a) they can accept electrons and transfer most of their energy to another molecule

What is this structure? a) thylakoid b) chloroplast c) photpsynthesis d) mitochondria

a) thylakoid

The stroma is the region outside the a) thylakoids b) chloroplasts c) plant cells d) mitochondria

a) thylakoids

What are the products of the light-dependent reactions? a) oxygen gas and glucose b) ATP, NADPH, and oxygen gas c) ATP, carbon dioxide gas, and NADPH d) carbon dioxide gas, oxygen gas, and NADPH

b) ATP, NADPH, and oxygen gas

Organisms that cannot make their own food and must obtain energy from external sources are called a) autotrophs b) heterotrophs c) thylakoids d) plants

b) heterotrophs

Where are photosystems I and III found? a) in the stroma b) in the thylakoid c) in the Calvin cycle d) in the cell membrane

b) in the thylakoid membrane

If carbon dioxide is completely removed from a plant's environment, what would you expect to happen to the plant's production of high energy sugars? a) More sugars will be produced b) No sugars will be produced c) the same number of sugars will be produced but without carbon dioxide d) fewer sugars will be produced at first, but then the plant will recover

b) no sugars will be produced

A geranium is a a) stack of chloroplasts b) stack of thylakoids c) membrane enclosing a thylakoid d) photsynthetic pigment molecule

b) stack of thylakoids

Which chemical shown in the picture is an electron carrier molecule? a) H2O b) carbon dioxide c) NADP+ d) oxygen

c) NADP+

What are the three parts of an ATP molecule? a) adenine, thylakoid, and phosphate group b) stroma, grana, and chlorophyll c) adenine, ribose, and three phosphate groups d) NADH, NADPH, and FADH2

c) adenine, ribose and three phosphate groups

Most plants appear green because chlorophyll a) absorbs green light b) absorbs violet light c) does not absorb green light d) does not absorb violet light

c) does not absorb green light

WHat is a product of the Calvin cycle? a) oxygen gas b) ATP c) high-energy sugars d) carbon dioxide gas

c) high-energy sugar

Where in the chloroplast is chlorophyll found? a) in the ATP b) in the stroma c) in the thylakoid membrane d) in the thylakoid space

c) in the thylakoid membrane

In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of a) glucose b) water c) oxygen d) ATP

c) oxygen

Where do the light dependent reactions take place? a) in the stroma of the chloroplast b) within the mitochondria membranes c) within the thylakoid membranes d) in the outer membrane of the chloroplasts

c) within the thylakoid membrane

Which of the following is NOT a step in the light-dependent reactions? a) High-energy electrons move through the electron transport chain b) Pigments in photosystem II absorb light c) ATP synthase allows H+ ions to pass through the thylakoid membrane d) ATP and NADPH are used to produce high energy sugars

d) ATP and NADPH are used to produce high- energy sugars

Why might the candle in jar A burn longer than the candle in jar B? a) carbon dioxide produced by the plant allows the candle to burn longer b) chlorophyll produced by the plant allows the candle to burn longer c) Glucose produced by the plant allows the candle to burn longer d) oxygen produced by the plant allows the candle to burn longer

d) Oxygen produced by the plant allows the candle to burn longer

Energy is released from ATP when... a) a phosphate group is added b) adenine bonds to ribose c) ATP is exposed to sunlight d) a phosphate group is removed

d) a phosphate group is removed

Which structures shown in the figure make up an ATP molecule? a) adenosine b) ribose c) phosphate d) all of the above

d) all of the above

What happens during photosynthesis? a) heterotrophs consume ATP b) Heterotrophs produce ATP c) Autotrophs consume carbohydrates d) autotrophs produce carbohydrates

d) autotrophs produce carbohydrates

Which of the following is NOT found in the overall reaction for photosynthesis? a) carbon dioxide b) water c) light d) nitrogen

d) nitrogen

Photosynthesis uses sunlight to convert water and carbon dioxide into a) oxygen and carbon b) high-energy sugars and proteins c) ATP and oxygen d) Oxygen and high energy sugars

d) oxygen and high energy sugars

Plants get the energy they need for photosynthesis by absorbing a) high-energy sugars b) chlorophyll a c) chlorophyll b d) sunlight

d) sunlight

In the future, between which parts of the molecule must the bonds be broken to form an ADP molecule? a) adenonine and ribose b) the first phosphate and adeonine c) ribose and the first phosphate d) the second and the third phosphate

d) the second and the third phosphate

Look at the figure all of the following are parts of an ADP molecule EXCEPT a) adenosine b) Ribose c) the first phosphate d) the third phosphate

d) the third phosphate

Which of the following is NOT a true statement about ATP? a) ATP consists of ribose, adenine, and three phosphate groups b) ADP is produced when ATP releases energy c) ATP provides energyfor the mechanical functions of cells d) used ATP is discarded by the cell as waste

d) used ATP is discarded by the cell as waste

Which of the following activities happens within the stroma? a)Photosystem I absorbs light b) ATP synthase produces ATP c) THe Calvin cycle produces sugars d) Electrons move through the electron transport chain

C) the calvin cycle produces sugars