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AP Bio Unit 3 and 4

Total questions: 75

Worksheet time: 38mins

Name
Class
Date
1.

Which macromolecules are enzymes?

a)

Carbohydrate

b)

Lipid

c)

Nucleic Acid

d)

Protein

2.

Why does the substrate binding activate the enzyme?

a)

Activates accessory molecules

b)

Changes shape

c)

Provides energy

d)

Transport reaction

3.

What is the function of enzymes?

4 lines
4.

How does an enzyme speed up the chemical reaction?

a)

Decrease the activation energy required

b)

Decrease the change in free energy

c)

Increase the activation enzyme required

d)

Increase the change in free energy

5.

Where does the substrate bind on an enzyme?

a)

Active site

b)

Enhancer

c)

Promoter

d)

TATA box

6.

Due to lower activation energy, how is the reaction rate affected?

a)

Decrease

b)

Increase

c)

Stays the Same

7.

What happens to an enzyme if the temperature increases too high?

a)

No effect

b)

Enzyme increases rate

c)

Enzyme decreases rate

d)

Enzyme denatures

8.

If the enzyme is denatured…

a)

No effect

b)

Reaction rate increases

c)

Reaction rate decreases

d)

Reaction stops

9.

Describe what happens when the enzyme is denatured

4 lines
10.

Inhibitor that binds to the active site

a)

Competitive inhibitor

b)

Noncompetitive inhibitor

11.

How does a noncompetitive inhibitor block binding of substrate?

4 lines
12.

What happens to reaction rate if temperatures decrease?

a)

Decrease

b)

Increase

c)

Stays the Same

13.

Which describes an endergonic reaction?

a)

Absorbs energy, nonspontaneous

b)

Releases energy, nonspontaneous

c)

Absorbs energy, spontaneous

d)

Releases energy, spontaneous

14.

Which describes an exergonic reaction?

a)

Absorb energy, nonspontaneous

b)

Releases energy, nonspontaneous

c)

Absorb energy, spontaneous

d)

Release energy, spontaneous

15.

What is the function of B in the metabolic pathway?

A → B → C

4 lines
16.

A → B → C → D Enzyme B is inhibited. What happens to the concentration of C?

a)

C increases

b)

C decreases

c)

C stays the same

17.

What molecule is responsible for powering cellular processes?

a)

ATP

b)

Glucose

c)

Membrane Potential

d)

Sucrose

18.

Which step of photosynthesis stores solar energy as ATP?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

19.

Which step of photosynthesis stores high energy electrons as NADPH?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

20.

Which step of photosynthesis synthesizes G3P (glucose)?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

21.

Which step of photosynthesis takes place in stroma?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

22.

Which step of photosynthesis takes place in the thylakoid?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

23.

Where does Calvin Cycle take place?

a)

Cristae

b)

Cytosol

c)

Stroma

d)

Thylakoid

24.

What is the function of photosynthesis?

a)

Capture sunlight and produce sugars

b)

Capture ATP and produce ion gradients

c)

Capture sugars and produce sunlight

d)

Capture ions and produce ATP

25.

Which describes the light dependent reactions?

a)

Light is absorbed to synthesize ATP & NADPH

b)

Light is absorbed to create a sodium gradient

c)

Light is used to synthesize organic compounds

d)

Light is used to heat the cell increasing reaction rate

26.

Where would you find chlorophyll?

a)

Cytosol

b)

Mitochondria

c)

Ribosome

d)

Thylakoid

27.

Which step is anaerobic?

a)

Glycolysis

b)

Krebs Cycle

c)

Oxidative Phosphorylation

28.

Where does glycolysis take place?

a)

Chloroplast

b)

Cytosol

c)

Mitochondria

d)

Nucleus

29.

Fermentation synthesizes ATP…

a)

True

b)

False

30.

What is the function of fermentation?

4 lines
31.

Where does Krebs Cycle take place?

a)

Cristae

b)

Cytosol

c)

Intermembrane space

d)

Matrix

32.

Where does the electron transport chain of cellular respiration occur?

a)

Cristae (Inner mitochondrial membrane)

b)

Cytosol

c)

Intermembrane space

d)

Matrix

33.

ATP is synthesized in the electron transport chain…

a)

True

b)

False

34.

If the ETC doesn’t make ATP, what is the function of the electron transport chain?

4 lines
35.

What is the first step of cellular respiration?

a)

Glycolysis

b)

Krebs Cycle

c)

Oxidative Phosphorylation

36.

What is the second step of cellular respiration?

a)

Glycolysis

b)

Krebs Cycle

c)

Oxidative Phosphorylation

37.

Which enzyme in mitochondria adds the P to ADP?

a)

ADP Phosphorylase

b)

ATP Synthase

c)

Kinase

d)

Phosphatase

38.

Which process precedes fermentation?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Oxidative Phosphorylation

39.

What is the final electron acceptor in cellular respiration?

a)

ATP

b)

NADH

c)

Oxygen

d)

Water

40.

Signaling by cell to cell contact like a Helper T cell binding to an antigen presenting cell. Which describes the type of signaling?

a)

Direct Signaling

b)

Local Signaling

c)

Long Distance Signaling

d)

Synaptic Signaling

41.

Where is the receptor for a steroid hormone?​

a)

Intracellular​

b)

Membrane Bound​

42.

Where is the receptor for a protein hormone?​

a)

Intracellular​

b)

Membrane Bound​

43.

Ligands are specific to type of cell they bind to.​

a)

True

b)

False

44.

What is the first step of signal transduction?

a)

Reception

b)

Response

c)

Transduction

45.

What is a signaling molecule called?

a)

Activator

b)

Enhancer

c)

Ligand

d)

Repressor

46.

Which of the following act as secondary messengers?​

a)

ATP and Ca2+​

b)

Ca2+ and cAMP​

c)

cAMP and ligand​

d)

Ligand and ATP​

47.

What is apoptosis?​

​

a)

Cell undergoing cellular division​

b)

Endocrine cell secreting proteins​

c)

Programmed cell death​

d)

Synthesis of ATP without glucose​

48.

Why is negative feedback essential for cell?

a)

Synthesizes ATP for cell

b)

Increases cellular communication

c)

Saves wasteful use of materials and energy

d)

To cause response​

49.

Oxytocin is released to initiate contractions, the force of the baby on the cervix leads to release of oxytocin, which causes more contractions. What type of feedback is described?

a)

Negative

b)

Positive

50.

Blood glucose level is high, pancreas releases insulin. The insulin causes the cells to take up blood sugar so the sugar level decreases. Which type of feedback is described above?

a)

Positive

b)

Negative

51.

When a fruit ripens it releases ethylene. Ethylene causes fruit to ripen so more ethylene is released. What type of feedback is described?

a)

Positive

b)

Negative

52.

Which phase of interphase does DNA replication occur?

a)

G1

b)

S

c)

G2

d)

All of them

53.

Mitosis divides…

a)

Chromosomes

b)

Cytoplasm

c)

Nucleus

d)

Organelles

54.

Cytokinesis divides…

a)

Chromosomes

b)

Cytoplasm

c)

Nucleus

d)

Organelles

55.

If the cell doesn’t get the go ahead at G1 checkpoint what happens?

4 lines
56.

Which phase involves sister chromatids in the middle of the cell?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

57.

Which phase involves single chromatids moving to poles?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

58.

Which phase involves nuclear envelope forming?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

59.

Cancer treatment involves chemotherapy with drugs that inhibit microtubules from depolymerizing. Which phase does this treatment target?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

60.

How does the parent and daughter cell compare in mitosis?

4 lines
61.

Which phase of interphase is responsible for DNA replication?

a)

G1

b)

G2

c)

M

d)

S

62.

Interphase occurs ____ mitosis in the cell cycle.

a)

After

b)

Before

c)

During

63.

Cytokinesis occurs ____ mitosis in the cell cycle

a)

After

b)

Before

c)

During

64.

Phase of mitosis in which chromosomes condense

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

65.

Phase of mitosis when sister chromatids are pulled to opposite poles.

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

66.

Phase of mitosis when sister chromatids align on plate in middle of the cell

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

67.

Phase of mitosis when two nuclear envelopes form.

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

68.

Which checkpoint determines whether the cell will divide?

a)

G1

b)

S

c)

G2

d)

M

69.

Which checkpoint verifies DNA has “no errors” and replicated?

a)

G1

b)

S

c)

G2

d)

M

70.

If the cell doesn’t get the go ahead signal in G1, where does it go?

a)

G0

b)

G1

c)

G2

d)

S

71.

What is the function of the M checkpoint?

a)

Check DNA is completed replication

b)

Check DNA is undamaged

c)

Check chromosomes are attached to spindle fibers

d)

Check cell should undergo division

72.

Which phase of mitosis is shown here?

a)

prophase

b)

metaphase

c)

anaphase

d)

telophase

73.
What phase of mitosis is this?
a)
Anaphase
b)
Cytonkinesis
c)
Interphase
d)
Prophase
74.
What phase of mitosis is shown in the picture?
a)
Prophase
b)
Anaphase
c)
Telophase
d)
Metaphase
75.
What phase of mitosis is this?
a)
Anaphase
b)
Cytokinesis
c)
Telophase
d)
Metaphase

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