gene regulation lac and trp operon AP BIO

Quiz
•
Science, Biology
•
University
•
Medium
+2
Standards-aligned
Paulína Kikinderová
Used 59+ times
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25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. What do figures X and Y in the graphic illustrate? 1p
Transcription and translation in a eukaryotic cell (figure X) and a prokaryotic cell (figure Y).
Transcription and translation in a prokaryotic cell (figure X) and a eukaryotic cell (figure Y).
Transcription in a eukaryotic cell (figure X) and translation in a prokaryotic cell (figure Y).
Transcription in a prokaryotic cell (figure X) and translation in a eukaryotic cell (figure Y)
Tags
NGSS.HS-LS1-1
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
1. Reformat to indicate that answer completes stem: "If glucose is absent but lactose is present, the lac operon will be____________." 1p
activated
repressed
partially activated
mutated
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
1. What would happen if the operator sequence of the lac operon contained a mutation that prevented the repressor protein from binding the operator? 1p
In the presence of lactose, the lac operon will not be transcribed.
In the absence of lactose, the lac operon will be transcribed.
The cAMP-CAP complex will not increase RNA synthesis.
The RNA polymerase will not bind the promoter.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. What would happen if the operator sequence of the trp operon contained a mutation that prevented the repressor protein from binding to the operator? 1p
In the absence of tryptophan, the genes trpA-E will not be transcribed.
In the absence of tryptophan, only genes trpE and trpD will be transcribed.
In the presence of tryptophan, the genes trpA-E will be transcribed.
In the presence of tryptophan, the trpE gene will not be transcribed.
Tags
NGSS.HS-LS1-1
NGSS.HS-LS3-1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are epigenetic modifications? 1p
the addition of reversible changes to histone proteins and DNA
the removal of nucleosomes from the DNA
the addition of more nucleosomes to the DNA
mutation of the DNA sequence
Tags
NGSS.HS-LS3-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Which of the following statements about epigenetic regulation is false? 1p
Histone protein charge becomes more positive when acetyl groups are added.
DNA molecules are modified within CpG islands.
Methylation of DNA and histones causes nucleosomes to pack tightly together.
Histone acetylation results in the loose packing of nucleosomes.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. The binding of what is required for transcription to start? 1p
a protein
DNA polymerase
RNA polymerase
a transcription factor
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