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Protein Synthesis And Mutations
Test Description: Protein Synthesis and Mutations
Instructions: Answer all questions to get your test result.
1) In a DNA molecule, which of the following bases pair together?
A
adenine and cytosine
B
thymine and adenine
C
thymine and guanine
D
cytosine and thymine
2) A gene is
A
a set of instructions for each trait.
B
All of the above
C
instructions on how to make a protein.
D
a portion of a strand of DNA.
3) Which of the following is NOT a step in making a protein?
A
Amino acids are joined together at the ribosome to make a protein.
B
Transfer molecules deliver amino acids to the nucleus.
C
mRNA is fed through the ribosome to create a protein.
D
An RNA strand is formed in the nucleus from the DNA code.
4) The code for a given amino acid consists of ____ base(s).
A
two
B
one
C
four
D
three
5) The complementary RNA strand to the DNA sequence CGTAGGATC would be
A
GCAUCCGAG
B
GCAUGGUG
C
GCATCCTAG
D
CGTAGGATC
6) If DNA changes from the base sequence of AAGGCCTTG to the sequence AACGCCTTG, what type of mutation occured?
A
omission
B
addition
C
deletion
D
substition
7) Fortunately, we have certain ____ that repair most mutations that occur in DNA molecules.
A
chromosomes
B
checkpoint enzymes
C
lysosomes
D
chromatids
8) A mutation in DNA could result in
A
a genetic disorder
B
death
C
no change at all
D
all of the above
9) If a mutation occurs in the DNA of ____ cells, it can be passed from one generation to the next.
A
sex
B
skin
C
heart
D
brain
10) If a change occurs in a base sequence of a DNA, it might cause a different ____ to be substituted in a protein.
A
nucleic acid
B
amino acid
C
enzyme
D
ribosome
11) How many amino acids does the DNA sequence GGCATTCAG code for?
A
1
B
6
C
9
D
3
12) The factory where the protein assembly line that copies the DNA strand is located is in the
A
ribosomes
B
nucleus
C
cell wall
D
cell membrane
13) Which of the following best describes insertion or deletion mutations?
A
They change the codon group within a gene.
B
They occur when one nucleotide is replaced with a different nucleotide.
C
They occur when, for example, the base UGU is changed to UGC.
D
They occur only in the thymine base.
14) Each group of three bases codes for the production of
A
a variety of type of chemicals.
B
particular carbohydrate molecules.
C
one amino acid.
D
certain types of DNA molecules.
15) What determines the genetic code?
A
the number of guanine and cytosine bases in a chromosome
B
the order of nitrogen bases along a gene
C
the order of amino acids in a protein
D
the number of nitrogen bases in a DNA molecule
16) The order of the bases along a gene determines the order in which
A
chromosomes are arranged in the nucleus.
B
amino acids are put together to form a protein.
C
sugars are put together to form a carbohydrate.
D
phosphates are arranged in DNA.
17) What do transfer RNA molecules do during protein synthesis?
A
copies the coded message from the DNA and carries it into the nucleus
B
copies the coded message from the DNA and carries it into the cytoplasm
C
copies the coded message from the protein and carries it into the nucleus
D
carries amino acids and adds them to the growing protein
18) What does messenger RNA do during protein synthesis?
A
copy the coded message from the protein and carry it into the nucleus
B
carry amino acids and add them to the growing protein
C
copy the coded message from the DNA and carry it into the nucleus
D
copy the coded message from the DNA and carry it into the nucleus
19) A mutation is harmful to an organism if it
A
changes the DNA of the organism.
B
makes the organism better able to avoid predators.
C
reduces the organism’s chances for survival and reproduction.
D
changes the phenotype of the organism.
20) Chromosomes are made up of
A
transfer RNA.
B
one pair of alleles.
C
many genes joined together.
D
many traits joined together.
*select an answer for all questions
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