RNAS-C EXAMS WITH VERIFIED
QUESTIONS AND CORRECT
ANSWERS
1. is .a .relatively .indigestible .strengthening .polymer .that .accounts .for .more
. than .a .quarter .of .the .dry .mass .of .wood.
a. cellulose
b. starch
c. lignin
d. none .of .the .above
- ANSWERS-c. .lignin
2. An . mRNA .molecule .with .360 .codons .has . nucleotides
a. 120
b. 180
c. 360
d. 1,080
e. 2,160
- ANSWERS-d. . 1,080
3. Compared .to .most .animals, .the .growth .of .most .plant .structure .is .best .described
. as:
a. perennial
b. weedy
c. indeterminate
d. primary
- ANSWERS-c. . indeterminate
4. During .initiation, .the .sequence .of .DNA .to .which .RNA .polymerase .binds
.most .tightly .is .the:
a. promoter
b. poly .C .center
c. poly .A .tail
d. 5' .cap
, e. minor .groove
- ANSWERS-a. . promoter
5. During . translation, . the . formation . of . a . peptide . bond . between . an . amino . acid
. at . the .P . site . and . an . amino .acid . at . the . A . site . is . catalyzed . by:
a. the . large . ribosomal . subunit
b. a .specialized .segment .of .DNA
c. a .specialized .segment .of .RNA
d. the . initiation . complex
e. initiation . factors
- ANSWERS-a. .the .large .ribosomal .subunit
6. Eukaryotic .DNA .can .pair .with .a .complementary .mRNA .sequence .in .a
.process .called .hybridized. .When .this .occurs, .the .hybrid .molecules .contain
.loops .of .double-stranded .DNA .called:
a. retroviruses
b. introns
c. exons
d. transcripts
e. puffs
- ANSWERS-b. .introns
7. If .a .5'-3' .strand .of .DNA .has .the .sequence .GTCTATGCATTA, .what .would .be
.the .sequence .of .the .resulting .transcribed .RNA?
a. 5'-GUCUAUGCAUUA-3'
b. 5'-GTCTATGCATTA-3'
c. 5'-CAGATACGTAAT-3'
d. 5'-CAGAUACGUAAU-3'
e. 3'-GUCUAUGCAUUA-5'
- ANSWERS-a. . . . 5'-GUCUAUGCAUUA-3'
8. Phloem .sap .can .flow:
a. from . leaves . to . shoots . only
b. from . shoots . to . leaves . only
c. from . sites . of . sugar . production . to . storage . units . only
d. both . ways . between . production . and . storage . sites
- ANSWERS-d. .both .ways .between .production .and .storage .sites
9. Ribosomes . are . a . collection . of . that . are . needed . for . :
a. small . proteins; . translation
b. proteins .and .small .RNAs; .translation
c. proteins .and .tRNAs; .transcription
d. proteins .and . mRNAs; . translation
QUESTIONS AND CORRECT
ANSWERS
1. is .a .relatively .indigestible .strengthening .polymer .that .accounts .for .more
. than .a .quarter .of .the .dry .mass .of .wood.
a. cellulose
b. starch
c. lignin
d. none .of .the .above
- ANSWERS-c. .lignin
2. An . mRNA .molecule .with .360 .codons .has . nucleotides
a. 120
b. 180
c. 360
d. 1,080
e. 2,160
- ANSWERS-d. . 1,080
3. Compared .to .most .animals, .the .growth .of .most .plant .structure .is .best .described
. as:
a. perennial
b. weedy
c. indeterminate
d. primary
- ANSWERS-c. . indeterminate
4. During .initiation, .the .sequence .of .DNA .to .which .RNA .polymerase .binds
.most .tightly .is .the:
a. promoter
b. poly .C .center
c. poly .A .tail
d. 5' .cap
, e. minor .groove
- ANSWERS-a. . promoter
5. During . translation, . the . formation . of . a . peptide . bond . between . an . amino . acid
. at . the .P . site . and . an . amino .acid . at . the . A . site . is . catalyzed . by:
a. the . large . ribosomal . subunit
b. a .specialized .segment .of .DNA
c. a .specialized .segment .of .RNA
d. the . initiation . complex
e. initiation . factors
- ANSWERS-a. .the .large .ribosomal .subunit
6. Eukaryotic .DNA .can .pair .with .a .complementary .mRNA .sequence .in .a
.process .called .hybridized. .When .this .occurs, .the .hybrid .molecules .contain
.loops .of .double-stranded .DNA .called:
a. retroviruses
b. introns
c. exons
d. transcripts
e. puffs
- ANSWERS-b. .introns
7. If .a .5'-3' .strand .of .DNA .has .the .sequence .GTCTATGCATTA, .what .would .be
.the .sequence .of .the .resulting .transcribed .RNA?
a. 5'-GUCUAUGCAUUA-3'
b. 5'-GTCTATGCATTA-3'
c. 5'-CAGATACGTAAT-3'
d. 5'-CAGAUACGUAAU-3'
e. 3'-GUCUAUGCAUUA-5'
- ANSWERS-a. . . . 5'-GUCUAUGCAUUA-3'
8. Phloem .sap .can .flow:
a. from . leaves . to . shoots . only
b. from . shoots . to . leaves . only
c. from . sites . of . sugar . production . to . storage . units . only
d. both . ways . between . production . and . storage . sites
- ANSWERS-d. .both .ways .between .production .and .storage .sites
9. Ribosomes . are . a . collection . of . that . are . needed . for . :
a. small . proteins; . translation
b. proteins .and .small .RNAs; .translation
c. proteins .and .tRNAs; .transcription
d. proteins .and . mRNAs; . translation
