What is meant by "gene expression"? (select all that apply)
Ch. 9 Quiz 1

Quiz
•
Biology
•
University
•
Hard
Laura Millard
Used 2+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
DNA is transcribed into mRNA
mRNA is translated into a polypeptide
A polypeptide is folded into a protein or protein subunit
Different subunits originating from different gene sequences form a protein complex
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
AUG is called the "start codon." What happens here?
DNA pol initiates replication
RNA pol initiates transcription
Spliceosome makes first mRNA cut
Ribosome initiates translation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Codons are recognized and matched up to...
tRNA anticodons
tRNA codons
Ribosomal anticodons
Ribosomal codons
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
In a bacterium, gene expression involves (select all that apply)
Transcription of DNA to mRNA
Transcript modifications, such as addition of a 5' cap
Movement of mRNA from the nucleus to the cytoplasm
Translation by ribosomes in the cytosol
Translation by ribosomes in the nucleus
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Why does the Eukaryotic mRNA need a 5' cap and 3' tail? (select all that apply)
Increases stability of the transcript in the cytosol, often by binding each other to form a circular mRNA
Eukaryotic ribosomes first bind the transcript at the 5' cap
The cap is translated into the first amino acid, Met, and the tail translates to the last, Lys
The purpose is not currently well understood
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can the ~28,000 human genes lead to hundreds of thousands of human proteins?!
Alternative splicing allows 1 gene to be expressed into multiple different proteins
Alternative splicing can transform 1 gene into another gene
Not all human proteins originate from our genes; some originate from the human diet
Due to degeneracy of the genetic code, different amino acids can be added during the translation process, creating different proteins
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is meant by a "charged" tRNA?
These tRNA molecules have their 3 phosphate groups still attached, meaning that they are a source of energy
These tRNA molecules are covalently bonded to an amino acid
These tRNA molecules are composed of positively charged amino acids
These tRNA molecules have catalytic function, breaking ATP without the help of an enzyme
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Because prokaryotes do not undergo post-transcriptional modifications, each mRNA transcript makes 1 type of polypeptide.
True
False
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