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PreAP Biology Unit 4 Review

Total questions: 27

Worksheet time: 17mins

Name
Class
Date
1.
A mutation is?
a)
Any change in DNA
b)
Any change in RNA
c)
Any change in the genetic code
2.
Mutations affect the ________ of a protein. Because of this the proteins ______ is affected as well. 
a)
gene, function 
b)
sequence, gene
c)
shape,function
3.
Why are framshift mutations harmful?
a)
They cause chromosomes to break
b)
Every amino acid following the mutation will be different
c)
They cause the DNA to relocated
d)
They burn out your clutch
4.
What situation causes a deletion?
a)
Part of the chromosome is missing
b)
Part of the chromosome is attached backwards
c)
Part of the chromosome breaks off and attaches to a different chromosome
d)
Part of a chromosome is duplicated 
5.
In an unmutated strand of DNA having 40 molecules of thymine means you also have 400 molecules of?
a)
Adeninie
b)
Cytosine
c)
Guanine
6.

Which type of mutation occurs when there is an addition or removal of a base?

a)

missense mutation

b)

nonsense mutation

c)

frameshift mutation

d)

point mutation

7.

A type of mutation that affect every codon beyond the point of mutation.

a)

Point Mutation

b)

Silent Mutation

c)

Nonsense Mutation

d)

Frameshift Mutation

8.
What are the building blocks of proteins called?
a)
DNA
b)
RNA
c)
Ribosomes
d)
Amino Acids
9.
What is a Gene?
a)
A segment of RNA that encodes for a protein
b)
A chromosome
c)
A segment of DNA that encodes for a protein
d)
Your genome
10.
Are all mutations bad?
a)
Yes
b)
No
11.
What pairs with Adenine (A)? 
a)
Guanine (G)
b)
Cytosine (C)
c)
Adenine (A)
d)
Thymine (T)
12.
What pairs with Thymine (T)?
a)
Adenine (A)
b)
Thymine (T)
c)
Guanine (G)
d)
Cytosine (C) 
13.
What pairs with Guanine (G)?
a)
Adenine (A)
b)
Thymine (T)
c)
Cytosine (C)
d)
Guanine (G)
14.
What pairs with Cytosine (C)?
a)
Guanine (G)
b)
Cytosine (C)
c)
Adenine (A)
d)
Thymine
15.

The structure of DNA is described as a ___ formed by two strands of nucleotides.

a)

double helix

b)

single spiral

c)

polymerase chain

d)

protein molecule

16.

A process called ____ uses the code carried by messenger RNA for protein synthesis.

a)

translation

b)

transcription

c)

unwinding

d)

elongation

17.

The three-base code in DNA or messenger RNA is called a ____.

a)

polymerase chain

b)

translation

c)

codon

d)

transfer RNA

18.

Which of these are not one of the nitrogenous bases in DNA nucleotides?

a)

adenine

b)

uracil

c)

guanine

d)

thymine

19.
Which defines a codon in DNA or mRNA?
a)
pair of nucleic acid and sugar
b)
pair of phosphate and sugar
c)
three-base code
d)
two-base code
20.
The "central dogma" states that genetic information flows from 
a)
Protein-->mRNA-->DNA
b)
Protein-->DNA-->mRNA
c)
mRNA-->DNA-->Protein
d)
DNA-->mRNA-->Protein
21.
Transcription takes place in the 
a)
cytoplasm
b)
ribosome
c)
mitochondrion
d)
nucleus
22.
Translation occurs in the
a)

nucleus

b)

mitochondria

c)

ribosome

d)

golgi apparatus

23.

The start codon is _______:

a)

AUG

b)

GGG

c)

UCG

d)

AAU

24.

What is the role of tRNA?

a)

To treat the DNA strand

b)

To transfer codons

c)

To transfer amino acids

d)

To tackle mutations

25.

RNA contains which sugar?

a)

deoxyribose

b)

Ribose

c)

glucose

d)

fructose

26.

Which will most likely cause an increase in the frequency of genetic mutations in humans?

a)

increased exposure to X reays

b)

increased exposure to mold spores in the air

c)

increased exposure to the rising levels of CO2

d)

increased exposure to bacteria in water

27.

A mutations is least likely to affect a cell when the mutation

a)

reverses the order of bases

b)

allows the number of bases in a DNA sequence to stay the same

c)

replaces a base with its complementary base

d)

produces a triplet that codes for the same amino acid as the original triplet

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