Review for Biology CP1 Final

1.

2 points

Energy needed to get a reaction started is the

2.

2 points

The Krebs Cycle releases energy in the form of ADP

True

False

3.

2 points

Enzymes work best at a specified pH

True

False

4.

2 points

What is the equation for Cellular Respiration?

5.

2 points

The net products of glycolysis are 2 ATP, 2 NADH, and 2 pyruvic acid molecules.

True

False

6.

2 points

Substances that enter a reaction are termed _______

7.

2 points

Energy can be created or destroyed

True

False

8.

2 points

All enzymes have the same shape as their substrates

True

False

9.

2 points

The first intermediate produced after the entry of acetyl-CoA into the Krebs cycle is?

10.

2 points

Energy is the capacity to do work

True

False

11.

2 points

The hydrogen ion gradient that forms across the membrane of the mitochondria makes ATP by?

12.

2 points

Heating inactivates enzymes by

breaking the covalent bonds that hold the molecule together

causing enzyme molecules to stick together

Changing the enzyme's three-dementional shape

removing phosphate groups from the enzyme

13.

2 points

A calorie is the amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius.

True

False

14.

2 points

To break down a glucose molecule completely how many "turns" of the Krebs cycle are required?

15.

2 points

Which is an electron carrier that plays a role in cellular respiration?

NAD+

NADP+

ATP

Pyruvic acid

16.

2 points

Where does the Krebs Cycle occur?

17.

2 points

What is the basic difference between exergonic and endergonic reactions?

Exergonic reactions release energy; endergonic reactions absorb it

Exergonic reactions involve the breaking of bonds; endergonic reactions involve the formation of bonds

Exergonic reactions involve ionic bonds; endergonic reactions involve covalent bonds

In exergonic reactions, the reactants have less chemical energy than the products; in endergonic reactions, the opposite is true.

18.

2 points

The starting molecule for glycolysis is _____

19.

2 points

The electron transfer chain of cellular respiration is located

on the inner membrane of thylakoids

on the inner membrane of chloroplasts

on the inner membrane of mitochondria

on the plasma membrane

20.

2 points

Which of the following statements is true about catalysts

catalysts slow down the rate of chemical reactions

All catalysts are enzymes

catalysts are used up during a chemical reaction

Catalysts lower the activation energy of a chemical reaction

21.

2 points

Which substance(s) is formed in the Krebs Cycle?

FADH2 only

NADH only

Oxygen only

NADH and FADH2

22.

2 points

A rock on top of a mountain contains _____ energy

23.

2 points

The breakdown of pyruvate in the Krebs cycle results in the release of

energy

carbon dioxide

oxygen

energy, carbon dioxide, and electrons

24.

2 points

What form of energy is ATP

25.

2 points

Which takes place in the cytoplasm?

glycolysis

electron transport

Krebs

photosynthesis

26.

2 points

In the presence of oxygen, glycolysis is followed by?

27.

2 points

Cellular Respiration is called an aerobic process because it requires oxygen

True

False

28.

2 points

Which of the following pass high-energy electrons to the electron transport chain?

NADH and FADH2

ATP and ADP

citric acid

acetyl-CoA

29.

2 points

The final electron acceptor in the electron transport chain is

02

NAD+

CO2

FAD+

30.

2 points

Which generates the most energy in the form of ATP?

anaerobic respiration

aerobic respiration

alcoholic fermentation

lactate fermentation

all generate the same amount, but through different means

31.

2 points

Either cellular respiration or fermentation can be used to release energy depending on the presence of carbohydrates.

True

False

32.

2 points

What term is used to describe a situation in which the energy released from one reaction provides the energy required for another reaction?

33.

2 points

During electron transport chain, which ions accumulate in the outer compartment of the mitochondria?

34.

2 points

For glycolysis to begin

glucose must enter the mitochondria

oxygen must be available

there must be an input of energy from ATP

heat must be supplied

35.

2 points

Which of the following could be a cofactor?

a ribosome

a zinc atom

a polypeptide

a protien

36.

2 points

Glycolysis provides a net gain of ___________ ATP molecules

37.

2 points

Electron carriers bring electrons from glycolysis and the Krebs cycle to the electron transport chain

True

False

38.

2 points

The greatest # of ATP molecules is produced in

glycolysis

alcoholic fermentation

anaerobic electron transfer

electron transfer train

39.

2 points

According to _______, energy cannot be created or destroyed.

40.

2 points

Metabolism involves?

the capacity if the cell to acquire energy

cellular processes used in accumulation of materials

reactions that break apart nutrients

disposal of material

All of these

41.

2 points

Which of the following is NOT a product of glycolysis?

NADH

Pyruvic acid

ATP

glucose

42.

2 points

High energy electrons that move down the electron transport chain ultimately provide the energy needed to

transport water molecules across the membrane

convert ADP molecules into ATP molecules

convert carbon dioxide into water molecules

break down glucose into pyruvic acid molecules

43.

2 points

Enzymes are protiens

True

False

44.

2 points

How do organisms get the energy they need?

by burning food molecules and releasing their energy as heat

by breathing oxygen into the lungs and combining it with carbon dioxide

by breaking down food molecules gradually and capturing their chemical energy

by using the sun's energy to break down food molecules and form chemicals

45.

2 points

The use of two ATP molecules at the beginning of glycolysis is comparable to _______ in financial language?

dividends

a credit

an investment

a debt

46.

2 points

Substrates bind to an enzyme's ______ site.

47.

2 points

Animals breathe in order to take in the carbon dioxide their cells need to perform cellular respiration.

True

False

48.

2 points

The shape of an enzyme allows it to do its job

True

False

49.

2 points

Which of the following is the correct sequence of events in cellular respiration

glycolysis->fermentation->Krebs cycle

Krebs cycle->electron transport->glycolysis

glycolysis->Krebs cycle->electron transport

Krebs cylce-> glycolysis->electron transport

50.

2 points

The greatest # of ATP is produced in

glycolysis

alcoholic fermentation

oxidative phosphorylation

the Krebs cycle