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WorksheetsAP Bio Exam Practice: Biochem-Central Dogma
Total questions: 37
Worksheet time: 23mins
Name
Class
Date
1.
This type of reaction generally breaks bonds with water
a)
Condensation
b)
Hydrolysis
c)
Condensed Soup
d)
Synthesis
2.
This type of reaction generally builds to form larger molecules storing more potential energy
a)
A) Endergonic
b)
B) Exergonic
c)
C) Condensation
d)
Both A & B
3.
Beta Pleated Sheets are known for their
a)
Strength
b)
Elasticity
c)
Dynamic Personality
d)
Community Service Hours
4.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
5.
A liquid with a pH of 4 is _x more concentrated in H+ than a liquid with a pH of 6.
a)
10
b)
100
c)
1,000
d)
10,000
6.
Which of the following is correct about water?
a)
it is a polar molecule and contains polar bonds
b)
it is a polar molecule and contains non-polar bonds
c)
it is a non-polar molecule and contains polar bonds
d)
it is a non-polar molecule and contains non-polar bonds
7.
What molecule is this?
a)
this is a monosaccharide
b)
this is a polysaccharide
c)
this is a protein
d)
this is a lipid
8.
Which of the following is the process used to bond the monomers together?
a)
Hydrolysis
b)
Water Removal
c)
Dehydration Synthesis
d)
Water Synthesis
9.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
10.
Catabolism is the net ____ of energy and Anabolism is the net ____ of energy
a)
output;input
b)
input;output
c)
output;output
d)
input;input
11.
Which letter represents the activation energy of a non-catalyzed reaction?
a)
a
b)
b
c)
c
d)
d
12.
All of the following are important characteristics of water in biology EXCEPT which?
a)
cohesion provides surface tension
b)
it is a nonpolar solvent
c)
it is a medium for complex chemical reactions in organisms
d)
it has a high specific heat that stabilizes ambient temperature
13.
Microtubles make up all of the following structures except ____.
a)
cilia
b)
centrioles
c)
flagella
d)
mitchondria
14.
The force necessary to cause microtubules of cilia and flagella to slide alongside one another is provided through the action of __________ proteins, which derive the energy to perform their work directly from __________ molecules.
a)
a.kinesin; ADP
b)
b.kinesin; glucose
c)
c.tubulin; ATP
d)
d.dynein; ATP
15.
Which of the following statements concerning centrioles is FALSE?
a)
a.They are present in most animal a. cells but not most plant cells.
b)
b.They are duplicated before cell division.
c)
c.They have a 9 + 2 arrangement of microtubules.
d)
d.They are found in the centrosome.
16.
The first step in the Calvin cycle is the attachment of carbon dioxide to:
a)
a.Rubisco.
b)
b.glyceraldehyde 3-phosphate
c)
(G3P).c.phosphoglycerate
d)
d.RuBP (ribulose bisphosphate).
17.
The amount of ATP produced in Krebs Cycle is same as Glycolysis
a)
True
b)
False
18.
The type of wavelengths in order from shortest to longest are:
a)
Gamma Rays, TV, microwave
b)
TV, radio waves, microwaves, visible light, UV
c)
Microwave, gamma rays, TV, visible light
d)
Itty bitty waves, Gamma Rays, Gamma Radiation
19.
During the Citric Acid Cycle (Krebs) each acetyl group entering the cycle yields
a)
1 ATP, 2 NADH, 3 FADH2
b)
1 ATP, 3 NADH, 2 FADH
c)
1 ATP, 2 NADH, 1 FADH2
d)
3 ATP, 2 NAD, 3ATP
20.
The process by which glucose is split into pyruvate producing 2 ATP and 2 NADH
a)
Chemiosmosis
b)
Electron Transport Chain
c)
Fermentation
d)
Glycolysis
21.
The process by which glucose is split to produce 2 ATP and lactic acid
a)
Chemiosmosis
b)
Electron Transport Chain
c)
Fermentation
d)
Glycolysis
22.
The process by which a proton gradient (hydrogen ions) is used to produce ATP
a)
Chemiosmosis
b)
Electron Transport Chain
c)
Fermentation
d)
Glycolysis
23.
The main products of the light reactions of photosynthesis are
a)
NADPH and ATP
b)
NADPH and FADH
c)
ATP and FADH2
d)
ATP and CO2
24.
In order for DNA instructions to move from the nucleus to the ribosomes in the cytoplasm of a cell, an RNA copy of a DNA strand must be made. This process, which takes place in a cell's nucleus is called...
a)
translation
b)
mutation
c)
DNA replication
d)
transcription
25.
tRNA is involved in
a)
carrying amino acids
b)
carrying ribosomes
c)
carrying glucose
d)
carrying lipids
26.
What is the function of mRNA?
a)
storage of food
b)
prevents mutations
c)
provides energy
d)
carries genetic message
27.
In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which of the following facts?
a)
DNA contains sulfur, whereas protein does not.
b)
DNA contains phosphorus, whereas protein does not.
c)
DNA contains nitrogen, whereas protein does not.
d)
DNA contains purines, whereas protein includes pyrimidines.
28.
Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
a)
8%
b)
16%
c)
31%
d)
42%
29.
Which of the following statements best describes the termination of transcription in prokaryotes?
a)
RNA polymerase transcribes through the polyadenylation signal, causing proteins to associate with the transcript and cut it free from the polymerase
b)
RNA polymerase transcribes through the terminator sequence, causing the polymerase to separate from the DNA and release the transcript.
c)
RNA polymerase transcribes through an intron, and the snRNPs cause the polymerase to let go of the transcript.
d)
Once transcription has initiated, RNA polymerase transcribes until it reaches the end of the chromosome.
30.
Reverse transcriptase is?
a)
mRNA made from tRNA
b)
DNA made from RNA primer
c)
DNA made from mRNA
d)
the cause of Huntington's disease
31.
What type of gene mutation has occurred here? Normal-
AGA-TTC-ATA-GCG
Mutant-
AGA-TTC-AAT-AGC-G
AGA-TTC-ATA-GCG
Mutant-
AGA-TTC-AAT-AGC-G
a)
deletion frameshift
b)
insertion frameshift
c)
substitution
d)
nonsense
32.
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTACGCAAC. This is an example of ___ mutation.
The mutated DNA segment is TTACGCAAC. This is an example of ___ mutation.
a)
Base Substitution
b)
Base Insertion
c)
Base Inversion
d)
Translocation
33.
The "on/off" switch for an operon is called the
a)
promoter
b)
repressor
c)
operator
d)
gene
34.
what does a promoter do?
a)
it allows a gene to be transcribed
b)
it creates a DNA segment
c)
it is another word for ribosomes
d)
it is another word for RNA
35.
The tryptophan operon is a repressible operon that is
a)
permanently turned on.
b)
turned on only when tryptophan is present in the growth medium.
c)
turned off only when glucose is present in the growth medium.
d)
turned off whenever tryptophan is added to the growth medium.
36.
Transcription of the structural genes in an inducible operon
a)
occurs all the time.
b)
starts when the pathway's substrate is present.
c)
starts when the pathway's product is present.
d)
stops when the pathway's product is present.
37.
What type of cells control immunity by making T cells and B cells?
a)
lymphocytes
b)
monocytes
c)
eosinophils
d)
basophils
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