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WorksheetsDNA RNA Protein Synthesis
Total questions: 23
Worksheet time: 12mins
Name
Class
Date
1.
Which pair of nucleotides are held together by hydrogen bonds?
a)
A and U
b)
A and G
c)
G and C
d)
U and G
2.
What structure in a cell is the site for making proteins?
a)
ribosomes
b)
mitochondria
c)
lysosome
d)
Golgi body
3.
When amino acids are bonded together, what kind of molecule do they make?
a)
nucleic acid
b)
polysaccharide
c)
lipid
d)
protein
4.
Which base is normally used in the synthesis of RNA but not in DNA?
a)
adenine
b)
uracil
c)
cytosine
d)
guanine
5.
With respect to normal base pairing, when a molecule of DNA replicates, thymine will pair with
a)
adenine
b)
cytosine
c)
guanine
d)
uracil
6.
Where in a DNA molecule would you find the hydrogen bonds?
a)
Between the phosphate and sugar
b)
Between the sugar and nitrogen bases
c)
Between the nitrogen bases
d)
At the phosphates
7.
Specific proteins produced in a cell are directly related to the
a)
number of mitochondria in the cell
b)
types of ribosomes in the cell
c)
sequence of sugars and phosphates in the cell
d)
sequence of nucleotides in the DNA
8.
What type of nucleic acid carries information from the nucleus of a cell to the cytoplasm/ribosome?
a)
DNA
b)
mRNA
c)
rRNA
d)
tRNA
9.
Which nucleic acid contains the base thymine?
a)
DNA
b)
mRNA
c)
rRNA
d)
tRNA
10.
Which nucleic acid carries amino acids to the ribosomes?
a)
DNA
b)
mRNA
c)
rRNA
d)
tRNA
11.
Which cell activity must occur in order for mitosis and meiosis to take place?
a)
translocation
b)
nondisjunction
c)
DNA replication
d)
RNA transcription
12.
Which event is not part of the process of DNA replication?
a)
Nitrogen base pairs are formed
b)
Hydrogen bonds are broken
c)
A double stranded molecule unwinds
d)
Ribosomes are synthesized
13.
Which compound is not part of the DNA nucleotide?
a)
adenine
b)
ribose
c)
thymine
d)
deoxyribose
14.
Which event takes place first during DNA replication?
a)
a single-stranded RNA molecule is formed
b)
tRNA links to the amino acids
c)
Free nucleotides are bonded together in the correct sequence
d)
The DNA molecule "unzips" along weak hydrogen bonds
15.
What would be the complementary DNA strand to the given strand of ATCGTA
a)
GCATCG
b)
TAGCAT
c)
ATGCTA
d)
CATGAC
16.
A DNA molecule with the sequence AGCTCA was used as a template for making mRNA. What would be the sequence of that mRNA molecule?
a)
TCAGCA
b)
UCGAGU
c)
AGCUCA
d)
ATGACT
17.
The sequence of bases in one strand of DNA is AGTC. The sequence of bases in the complementary strand is
a)
ACTG
b)
GACU
c)
TCAG
d)
CTGA
18.
As part of its structure, a known gene contains the base sequence AATCGA. An alteration of the sequence to AACCGA is known as
a)
deletion
b)
disjunction
c)
mutation
d)
segregation
19.
If one side of the helix is CACTGG, the complementary side would be
a)
CACTGG
b)
GGTCAC
c)
GTGACC
d)
GTGUCC
20.
During protein synthesis, amino acids in the cytoplasm are picked up by molecules of __________ and taken to the ribosome.
a)
tRNA
b)
mRNA
c)
mitochondrial DNA
d)
nuclear DNA
21.
Where does protein synthesis takes place?
a)
vacuole
b)
ribosome
c)
chloroplast
d)
mitochondria
22.
What will happen if a base sequence of a strand of DNA is changed from ATG to ATC?
a)
the mRNA will be changed from UAC to UAG
b)
The tRNA will be changed from UAC to TAC
c)
the mRNA will be changed from TUC to TUG
d)
the tRNA will be changed from CAU to CAC
23.
The correct order of molecules involved in protein synthesis is...
a)
mRNA, tRNA, DNA, protein
b)
DNA, mRNA, protein, tRNA
c)
tRNA, protein, DNA, mRNA, DNA
d)
DNA, mRNA, tRNA, protein
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