Chapter 17
14) When DNA replicates, a guanine forms a base pair with —A) uracil B) adenine C) guanine D) thymine E) cytosine
E
19) In transcription A) the MRNA produced is identical to the parent DNA B) a double helix containing one parent strand and one daughter strand is produced C) uracil pairs with thymine D) both strands of the DNA are copied E) the MRNA produced is complementary to one strand of the DNA
E
29) The codon UGA codes fon A) Pha B) Tyr C) Start D) Met E) Stop
E
3) Which of the following cannot be found in a nucleotide of RNA? A) purine B) pyrimidine C) phosphate D) ribose E) deoxyribose
E
32) Mutations are the result of A) alterations in the phosphate of the DNA backbone B) exposure to water in utero C) physical trauma in the mother's childhood D) alterations in the sugar component of the DNA backbone E) alterations in the DNA base sequence
E
5) Which of the following will not be found in DNA? A) adenine B) thymine C) guanine D) cytosine E) ribose
E
7) The interactions that link the nucleotides in a nucleic acid are A) ionic bonds B) peptide bonds C) hydrogen bonds D) hydrophobic bonds E) phosphodiester bonds
E
15) The codon AGA codes for serine.
False
16) The process of translocation involves the synthesis of mRNA.
False
18) Down syndrome is an acquired disease, not a genetic disease.
False
19) AZT is a drug used in the treatment of cancer.
False
20) A retrovirus uses DNA as its genetic material.
False
3) A nucleotide consists of only a base and a sugar.
False
5) The unique sequence of bases in a nueleic acid is the secondary structure.
False
7) The sequence of bases in a nucleie acid is the secondary structure.
False
8) The DNA complement of the sequence -G CCAT. is -GCCAT-.
False
9) DNA is a protein.
False
1) Adenine is a purine.
True
10) In the DNA double helix, a purine can only pair with a pyrimidine.
True
11) MRNA codons contain three "letters."
True
12) The stop codon terminates protein synthesis.
True
13) Messenger RNA carries protein synthesis information from the nucleus to the ribosomnes.
True
14) The codon UUU codes for phenylalanine.
True
17) The start codon is AUG.
True
2) Uracil is a pyrimidine.
True
4) One of the differences between DNA and RNA is the sugar it contains.
True
6) Nucleotides are linked by phosphodiester bonds.
True
1) A —consists of a nitrogen-containing base and a sugar. A) nucleoside B) base pair C) nucleotide D) complementary base E) pyrimidine
A
15) The two strands of the double helix of DNA are held together by —A) hydrogen bonds B) covalent bonds C) dipole-dipole interactions D) ionic bonds E) sugar-to-phosphate bonds
A
16) In the synthesis of MRNA, an adenine in the DNA pairs with —A) uracil B) adenine C) guanine D) thymine E) cytosine
A
17) Which of the following types of RNA carries the genetic information from DNA in the nucleus to the ribosomes? A) MRNA B) histone RNA C) RNA D) tRNA E) SRNA
A
21) Which one of the following base pairs is found in DNA? A) adenine-thymine B) adenine-guanine C) cytosine-thymine D) adenine-uracil E) guanine-uracil
A
25) The codon is found on and the anticodon is found on A) MRNA, TrNA B) TrNA. MRNA C) trNA. TRNA D) ribosomes, RNA E) MRNA, RrNA
A
33) The result of a defective enzyme caused by a mutation in the DNA nucleotide sequence is A) a genetic disease B) AIDS C) HIV D) recombinant DNA E) translocation
A
34) When a mutation occurs by elimination of one base in a DNA sequence, this mutation is called a A) frameshift mutation B) insertion mutation C) substitution mutation D) translocation mutation E) viral mutation
A
Match the following. A) RNA B) mRNA C) BNA D) DNA 1) picks up the specific amino acids for protein synthesis
A
Match the following. A) RNA B) mRNA C) BNA D) DNA 6) the nucleic acid that contains a single anticodon for a specific amino acid
A
10) The base sequence of the strand of DNA complementary to the segment -TGGCAAC- is: A) -TGGCAA C- B) -ACCGTT G- C) -ACCGUUG- D) -UCCGTTG- E) -A CGCTUG-
B
18) The base sequence of the DNA template strand is -T GCAA C.. What is the corresponding MRNA? A) -TGCAAC- B) -ACGUU G- C) -ACCUU G- D) -UCGTT G- E) -UCGTTC.
B
22) A DNA terhplate having the base sequence -AGATGA-would produce a mRNA with a base sequence of A) -AGATG A- B) -UCUACU- C) -TCTUCT- D) -TCTACA- E) -ACAUCA-
B
36) Small living particles, with 3 to 200 genes, that cannot replicate without a host cell are called A) recombinant DNAS B) viruses C) bacteria D) tumors E) plasmids
B
4) Which of the following is found in RNA but not in DNA? A) thymine B) uracil C) guanine D) cytosine E) deoxyribose
B
9) The unique sequence of bases in a nucleic acid is called the —-structure. A) ionic B) primary C) secondary D) tertiary E) quaternary
B
Match the following. A) RNA B) mRNA C) BNA D) DNA 2) synthesized by the DNA to carry the genetic message to the ribosomes
B
Match the following. A) RNA B) mRNA C) BNA D) DNA 4) the nucleic acid that contains the codons for the amino acids of a protein
B
28) The anticodon of UAG is A) ATC B) UAG C) AAC D) AUC E) GAU
D
11) The bonds that link the base pairs in the DNA double helix are— A) ionic bonds B) peptide bonds C) hydrogen bonds D) hydrophobic interactions E) ester bonds
C
2) A —consists of a nitrogen-containing base, a sugar, and a phosphate group. A) nucleoside B) base pair C) nucleotide D) complementary base E) purine
C
20) Which of the following is a section of MRNA produced from the DNA template below? ATAGCTA- A) -ATAGCTA- B) -AUAGCUA- C) -U AUCGAU- D) -UUUGCUU- E) -TATCGAT-
C
23) Codons are base pair sequences that A) signal the start of DNA synthesis B) signal the end of DNA synthesis C) code for amino acids D) signal the start of RNA synthesis E) code for one or more bases in mRNA
C
24) When mRNA is synthesized using the information from DNA, the process is called —A) transportation B) transposition C) transcription D) translation E) transliteration
C
31) What tripepstide, is coded for by the following mRNA sequence? -UUU AGA CCA- A) Phe-Pro-Arg B) Pro-Arg-lhe C) Phe-Arg-Pro D) Leu-Pro-Arg E) Pbe The-Pro
C
35) A mutation which occurs when one base in a DNA sequence replaces another, is called a A) frameshift mutation B) insertion mutation C) substitution mutation D) translocation mutation E) viral mutation
C
38) Protease inhibitors, which are effective anti-HIV drugs, A) are nucleoside analogs B) prevent reverse transeription C) prevent synthesis of viral proteins D) prevent mRNA synthesis E) prevent activation of tBNA
C
8) The nucleotides in the backbone of DNA are held together by—- bonds. A) hydrogen B) peptide C) phosphodiester D) glysosidis E) ionic
C
Match the following. A) RNA B) mRNA C) BNA D) DNA 5) the most abundant nucleic acid in the ribosomes
C
12) The two new DNA molecules formed in replication A) are different from the original DNA B) both contain only two new daughter DNA strands C) both contain only the parent DNA strands D) contain one parent and one daughter strand E) are identical, with one containing both parent strands, and the other containing both daughter strands
D
13) What is the process in which the DNA double helix unfolds, and each strand serves as a template for the synthesis of a new strand? A) transcription B) complementation C) translation D) replication E) restriction
D
26) The anticodon is A) identical to the codon on DNA B) complementary to the codon on DNA C) identical to the codon on mRNA D) complementary to the codon on mRNA E) complementary to the codon on BNA
D
27) During protein synthesis, the codon for an amino acid is found on A) DNA B) ReNA C) TrNA D) MRNA E) SRNA
D
30) Translation is the process whereby A) DNA is synthesized from DNA B) DNA is synthesized from MRNA C) protein is synthesized from DNA D) protein is synthesized from mRNA E) mRNA is synthesized from DNA
D
37) A virus that contains RNA as its genetic material is a A) genetically engineered virus B) bacteria C) recombinant DNA D) retrovinus E) vaccine
D
6) Which of the following can be found in DNA? A) ribose B) GMP C) uracil D) deoxyadenosine E) FMN
D
Match the following. A) RNA B) mRNA C) BNA D) DNA 3) contains within the nucleus of the cell the information for the synthesis of protein
D
