Unit 6 AP Biology Gene Expression and Regulation

Quiz
•
Biology
•
9th Grade
•
Easy
Standards-aligned
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Contrast amount of DNA between prokaryotes and eukaryotes.
Eukaryotes have multiple DNA strands while prokaryotes have one DNA strand
Prokaryotes have multiple DNA strands while eukaryotes have one DNA strand
Answer explanation
The DNA structure differs between prokaryotes and eukaryotes. Prokaryotes have a single circular DNA strand while eukaryotes have multiple linear DNA strands. Prokaryotes store theirs in the nucleoid while eukaryotes store theirs in the nucleus.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which direction is DNA synthesized in DNA replication?
3' -> 5’
5' -> 3’
C terminus to N terminus
N terminus to C terminus
Answer explanation
DNA is antiparallel, so it is synthesized
5' -> 3’ and read 3' -> 5’. Recall the 5’ end is the phosphate group and the 3’ end is the hydroxyl of the deoxyribose.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Function of Poly A tail...
Add phosphates to the RNA
Provide ATP for transcription
Protect from hydrolytic enzymes
Site of ribosome binding
Answer explanation
The poly-A tail is made up of multiple adenines at the end of the mRNA. As the hydrolytic enzymes in the cytosol hydrolyze the mRNA, it prolongs its "life" in the cytosol to maximize protein synthesized.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In RNA, adenine pairs with...
Cytosine
Guanine
Thymine
Uracil
Answer explanation
RNA has four nucleotides: adenine, cytosine, guanine, and uracil. Base pairing is Adenine with Uracil and Cytosine with Guanine.
Apples Under the Tree (A-U)
Cars in the Garage (C-G)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which RNA has an anticodon that pairs with codon?
mRNA
rRNA
tRNA
Answer explanation
tRNA is the transfer RNA. The main function of the tRNA is the bring amino acids to the ribosome. The tRNA has an anticodon that pairs with the mRNA codon to ensure the correct amino acid is added.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is at the 5’ end of DNA?
Hydrogen
Hydroxyl
Nitrogenous Base
Phosphate
Answer explanation
The 5’ end has the phosphate group.
The 1’ end has the nitrogenous base.
The 3’ end has the hydroxyl group of the pentose sugar.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which RNA functions as site of protein synthesis?
mRNA
rRNA
tRNA
Answer explanation
rRNA is the ribosomal RNA. Ribosomes, the site of protein synthesis, is composed of protein and rRNA.
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