DNA & PROTEIN SYNTHESIS
When a foreign gene is incorporated into an organisms nucleic acid, the resulting molecule is called
Recombinant DNA
For a substance to be classified as a mutagen it must cause
A change in DNA
DNA Replication involves the breaking of bonds between
Bases
A function of transfer RNA (tRNA) is to
Carry amino acids to the growing polypeptide chain
A role of mRNA in protein synthesis is to
Carry genetic information out of the nucleus
Which of the following statements best describes DNA replication?
DNA nucleotides, by complementary base pairing with DNA, produce DNA
Recombinant DNA is defined as DNA produced from
DNA of two different organisms
A change in the sequence of bases in a strand of DNA that occurs as a result of exposure to X-rays is an example of
Mutation
Determine the sequence of amino acids produced by this DNA sequence: GGAGTTTTC
Proline,Glutamine,Lysine
Two sugars found in nucleic acids are
deoxyribose and ribose
The product of transcription is
mRNA
During protein synthesis, peptide bonds are formed at the
ribosomes
The molecule that is responsible for carrying amino acids to ribosomes is
tRNA
Use the following events to answer this question. 1.mRNA is formed. 2.DNA segment opens (unzips). 3.mRNA attaches to ribosomes. 4.Amino acids form peptide bonds. 5.tRNA carries amino acids to mRNA. 6.The correct order of events required for protein synthesis is:
2,1,3,5,4
Use the following information to answer the question: 1.Uracil bonds with Adenine. 2.Complementary bonding between codon and anticodon. 3.DNA unzips. 4.mRNA joins with ribosome.
3,1,4,2
A polypeptide found in the cytoplasm of a cell contains 12 amino acids. How many nucleotides would be required in the mRNA for this polypeptide to be translated?
36
Which of the following would be a result of the substitution of one base pair in DNA by a different base pair during replication?
A mutation would occur
If the code for an amino acid is AGC on the DNA molecule, the anticodon on the tRNA would be
AGC
The tRNA anticodon for the DNA sequence AGT would be
AGU
If the nucleotide sequence of an anticodon was AUC, then the DNA triplet would be
ATC
Which of the following is an example of complementary base pairing?
Adenine-Thymine
Which of the following is the correct matching of base pairs in DNA?
Adenine-Thymine and Guanine-Cytosine
Which of the following describes a DNA molecule?
Double chain of nucleotides joined by hydrogen bonds
A section of DNA has the following sequence of nitrogenous bases: CGATTACAG
GCUAAUGUC
Which of the following best describes the function of mRNA
It is transcribed from the DNA and carries the information to the ribosome
One of the functions of DNA is to
Make copies of itself
If the triplet code on a DNA molecule changes from ACT to AGC, the result is called
Mutation
Which of the following terms describes the process shown below? DNA>mRNA
Transcription
mRNA is produced in the process called
Transcription
Which of the following would not occur during complementary base pairing?
U-G
The base found in RNA nucleotides but not in DNA nucleotides
Uracil (U)
The number of adenine bases in a DNA molecule equals the number of thymine bases because
adenine on one strand bonds to thymine on the other strand.
