Ch. 9 Quiz 1

Ch. 9 Quiz 1

University

8 Qs

quiz-placeholder

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Ch. 9 Quiz 1

Ch. 9 Quiz 1

Assessment

Quiz

Biology

University

Hard

Created by

Laura Millard

Used 2+ times

FREE Resource

8 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

What is meant by "gene expression"? (select all that apply)

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