BIO 1050 EXAM 2 ECU COMPREHENSIVE
QUESTIONS AND ANSWERS GRADED A+
◉ In plant and animal cells, termination of transcription occurs at.
Answer: a. the tRNA.
b. the promoter.
c. the T site.
*d. the terminator DNA.
e. a stop codon.
◉ 3. You run a forensics lab. Based on the techniques we talked
about in class, which of the following is LEAST important if you want
to determine if DNA from a crime scene is from a suspect?.
Answer: a. Checking if any of 13 sites on the DNA are different.
b. Separating fragments of the DNA by size on a gel.
c. Making many copies of the DNA and cutting it into fragments at
specific sequences.
*d. Transcribing and translating the DNA into proteins.
e. Adding dye that labels DNA to the gel, so you can see the
fragments of DNA.
,◉ 4. In plant and animal cells, which of the following does NOT
happen after transcription and before translation?.
Answer: a. the mRNA leaving the nucleus
b. adding a 3' poly-A tail to the mRNA
*c. ribosomes moving along the mRNA
d. removing the introns of the mRNA
e. adding a 5' cap to the mRNA
◉ 5. All of the cells of an organism have the same DNA. The sequence
of nucleotides in DNA is important because the information.
Answer: a. is transcribed into proteins, then translated into mRNA.
b. is translated into mRNA, then transcribed into proteins.
c. is replicated directly into proteins.
d. is translated into proteins, then transcribed into mRNA.
*e. is transcribed into mRNA, then translated into proteins.
◉ Where would you find a hydrophobic amino acid?.
Answer: *a. touching the tails of phospholipids in a bilayer
b. in the cytosol
c. equally often touching the heads or tails of phospholipids in a
bilayer
d. as part of the DNA
, e. touching hydrophilic amino acids because opposites attract
◉ The importance of transcription and translation are that together
they.
Answer: a. replicate the DNA so that one copy is available for each
daughter cell during cell division.
b. make the phospholipid bilayers of cellular membranes.
c. break down stored energy into the usable form, ATP.
d. store energy from sunlight in the form of glucose and starches.
*e. make specific proteins from the information on the DNA.
◉ Bonds between sugars and phosphates are found.
Answer: a. within single water molecules.
*b. in the backbone of DNA.
c. in peptides.
d. in phospholipid bilayers.
e. in proteins.
◉ Both transcription and DNA replication require.
Answer: *a. a polymerase.
b. mRNA.
c. tRNA.
QUESTIONS AND ANSWERS GRADED A+
◉ In plant and animal cells, termination of transcription occurs at.
Answer: a. the tRNA.
b. the promoter.
c. the T site.
*d. the terminator DNA.
e. a stop codon.
◉ 3. You run a forensics lab. Based on the techniques we talked
about in class, which of the following is LEAST important if you want
to determine if DNA from a crime scene is from a suspect?.
Answer: a. Checking if any of 13 sites on the DNA are different.
b. Separating fragments of the DNA by size on a gel.
c. Making many copies of the DNA and cutting it into fragments at
specific sequences.
*d. Transcribing and translating the DNA into proteins.
e. Adding dye that labels DNA to the gel, so you can see the
fragments of DNA.
,◉ 4. In plant and animal cells, which of the following does NOT
happen after transcription and before translation?.
Answer: a. the mRNA leaving the nucleus
b. adding a 3' poly-A tail to the mRNA
*c. ribosomes moving along the mRNA
d. removing the introns of the mRNA
e. adding a 5' cap to the mRNA
◉ 5. All of the cells of an organism have the same DNA. The sequence
of nucleotides in DNA is important because the information.
Answer: a. is transcribed into proteins, then translated into mRNA.
b. is translated into mRNA, then transcribed into proteins.
c. is replicated directly into proteins.
d. is translated into proteins, then transcribed into mRNA.
*e. is transcribed into mRNA, then translated into proteins.
◉ Where would you find a hydrophobic amino acid?.
Answer: *a. touching the tails of phospholipids in a bilayer
b. in the cytosol
c. equally often touching the heads or tails of phospholipids in a
bilayer
d. as part of the DNA
, e. touching hydrophilic amino acids because opposites attract
◉ The importance of transcription and translation are that together
they.
Answer: a. replicate the DNA so that one copy is available for each
daughter cell during cell division.
b. make the phospholipid bilayers of cellular membranes.
c. break down stored energy into the usable form, ATP.
d. store energy from sunlight in the form of glucose and starches.
*e. make specific proteins from the information on the DNA.
◉ Bonds between sugars and phosphates are found.
Answer: a. within single water molecules.
*b. in the backbone of DNA.
c. in peptides.
d. in phospholipid bilayers.
e. in proteins.
◉ Both transcription and DNA replication require.
Answer: *a. a polymerase.
b. mRNA.
c. tRNA.
