IBS Set 1 Quiz - DNA and Gene expression

Question 1 of 31

1

Adenine complementary pairs to what other bases in DNA and RNA?

Select one or more of the following:

Cytosine
Guanine
Thymine
Uracil

Explanation

Question 2 of 31

1

What direction does the coding strand run in?

Select one of the following:

5' to 3'
3' to 5'

Explanation

Question 3 of 31

1

What direction does the template strand run in?

Select one of the following:

5' to 3'
3' to 5'

Explanation

Question 4 of 31

1

What is the correct process of DNA replication?

Select one of the following:

DNA helicase unwinds -> SSBP -> Primase -> DNA polymerase builds new DNA strand in 5' to 3' -> exonuclease removes primers -> DNA polymerase fills the gaps -> DNA ligase fixes gap in sugar-phosphate backbone.
DNA helicase unwinds -> SSBP -> Primase -> DNA polymerase builds new DNA strand in 3' to 5' -> exonuclease removes primers -> DNA polymerase fills the gaps -> DNA ligase fixes gap in sugar-phosphate backbone.
DNA gyrase unwinds -> SSBP -> Primase -> DNA polymerase builds new DNA strand in 5' to 3' -> exonuclease removes primers -> DNA polymerase fills the gaps -> DNA ligase fixes gap in sugar-phosphate backbone.
DNA gyrase unwinds -> SSBP -> Primase -> DNA polymerase builds new DNA strand in 3' to 5' -> exonuclease removes primers -> DNA ligase fills the gaps -> DNA ligase fixes gap in sugar-phosphate backbone.

Explanation

Question 5 of 31

1

What is the function of Gyrase?

Select one of the following:

Prevent DNA supercoiling
Unwind the double stranded DNA
Remove RNA primers
Add DNA repeats to the 3' end of DNA strands in telomere regions (at the end of the chromosome)

Explanation

Question 6 of 31

1

What is the function of telomerase?

Select one of the following:

Add DNA repeats to the 3' end of DNA strands in telomere regions (at the end of the chromosome)
Prevents DNA supercoiling
Unwinds the DNA double strand
Remove RNA primers

Explanation

Question 7 of 31

1

Which type of RNA encodes the amino acid sequence of a polypeptide?

Select one of the following:

mRNA
rRNA
tRNA
snRNA

Explanation

Question 8 of 31

1

Which type of RNA forms a protein complex which aid in the formation of a spliceosome?

Select one of the following:

mRNA
snRNA
rRNA
tRNA

Explanation

Question 9 of 31

1

Which type of RNA is a component of the ribosome?

Select one of the following:

rRNA
mRNA
tRNA
snRNA

Explanation

Question 10 of 31

1

Which type of RNA is responsible for bringing amino acids to the ribosomes during translation?

Select one of the following:

tRNA
rRNA
mRNA
snRNA

Explanation

Question 11 of 31

1

What does label 1 show on the model of the gene?

Select one of the following:

Promoter
RNA coding sequence
Terminator

Explanation

Question 12 of 31

1

What does label 2 show on the model of the gene?

Select one of the following:

Promoter
RNA coding sequence
Terminator

Explanation

Question 13 of 31

1

What does label 3 show on the model of the gene?

Select one of the following:

Promoter
RNA coding sequence
Terminator

Explanation

Question 14 of 31

1

The process of transcription is what?

Select one of the following:

DNA Helicase unwinds -> Gyrase alleviates supercoiling -> RNA polymerase binds to the promoter and starts in 5' to 3' -> Terminator is reached -> pre-mRNA is cleaved off -> DNA helix is reformed.
DNA Helicase unwinds -> Telomerase alleviates supercoiling -> RNA polymerase binds to the promoter and starts in 5' to 3' -> Terminator is reached -> pre-mRNA is cleaved off -> DNA helix is reformed.
DNA Helicase unwinds -> Gyrase alleviates supercoiling -> RNA polymerase binds to the promoter and starts in 3' to 5' -> Terminator is reached -> pre-mRNA is cleaved off -> DNA helix is reformed.
DNA Helicase unwinds -> Telomerase alleviates supercoiling -> RNA polymerase binds to the promoter and starts in 3' to 5' -> Terminator is reached -> pre-mRNA is cleaved off -> DNA helix is reformed.

Explanation

Question 15 of 31

1

Splicing occurs in both prokaryotic and eukaryotic transcription.

Select one of the following:

True
False

Explanation

Question 16 of 31

1

Select the processes which occur in the nucleus

Select one or more of the following:

DNA replication
Transcription
Splicing
Translation

Explanation

Question 17 of 31

1

Select the process which occurs in the cytoplasm

Select one of the following:

DNA replication
Translation
Transcription
Splicing

Explanation

Question 18 of 31

1

The start codon on mRNA is always what set of bases?

Select one of the following:

ATG
TAC
AUG
AGU

Explanation

Question 19 of 31

1

The 40s subunit of an 80s ribosome contains the P and A site where the tRNA binds.

Select one of the following:

True
False

Explanation

Question 20 of 31

1

What is the process of amino acid charging?

Select one of the following:

AA attaches to amino-acyl tRNA synthetase -> ATP binds to docking site -> hydrolysed to AMP -> AMP exits -> tRNA becomes charged -> charged tRNA is released
AA attaches to amino-acyl tRNA synthetase -> ATP binds to docking site -> hydrolysed to ADP -> ADP exits -> tRNA becomes charged -> charged tRNA is released

Explanation

Question 21 of 31

1

What is the process of translation?

Select one of the following:

Methionine-tRNA's anticodon UAC binds to the AUG sequence on mRNA -> Ribosome clamps to mRNA strand -> Peptide bond formation via Peptidyl transferase -> continuation -> STOP codon is reached -> release factor binds (no tRNA with anticodon) -> peptidyl transferase causes final protein to be ejected -> machinery disassembles
Methionine-tRNA's anticodon AUG binds to the UAC sequence on mRNA -> Ribosome clamps to rRNA strand -> Peptide bond formation via Peptidyl transferase -> continuation -> STOP codon is reached -> release factor binds (no tRNA with anticodon) -> peptidyl transferase causes final protein to be ejected -> machinery disassembles
Methionine-tRNA's anticodon AUG binds to the UAC sequence on mRNA -> Ribosome clamps to mRNA strand -> Peptide bond formation via Peptidyl transferase -> continuation -> STOP codon is reached -> release factor binds (no tRNA with anticodon) -> peptidyl transferase causes final protein to be ejected -> machinery disassembles
Methionine-tRNA's anticodon UAC binds to the AUG sequence on mRNA -> Ribosome clamps to mRNA strand -> Peptide bond formation via aminoacyl transferase -> continuation -> STOP codon is reached -> release factor binds (no tRNA with anticodon) -> peptidyl transferase causes final protein to be ejected -> machinery disassembles

Explanation

Question 22 of 31

1

Convention is that polypeptides start with a C terminus and end with an N terminus.

Select one of the following:

True
False

Explanation

Question 23 of 31

1

Polysomes are advantageous because they mean mRNA, which is very unstable, can be translated into many proteins despite having a short life span.

Select one of the following:

True
False

Explanation

Question 24 of 31

1

What are the three generic types of DNA mutations?

Select one or more of the following:

Insertion
Substitution
Deletion
Rearrangement
Reorderment

Explanation

Question 25 of 31

1

What is meant by a silent mutation?

Select one of the following:

The same amino acid is coded for, because although the base is substituted for a different one, the codon still codes for the same amino acid due to the degenerate nature of the triplet code.
A different amino acid is coded for for that particular triplet but the protein itself still remains functional.
A premature STOP codon is coded for by the substitution which leads to a truncated,, non functional protein.

Explanation

Question 26 of 31

1

What is meant by a missense mutation?

Select one of the following:

The same amino acid is coded for, because although the base is substituted for a different one, the codon still codes for the same amino acid due to the degenerate nature of the triplet code.
A different amino acid is coded for for that particular triplet but the protein itself still remains functional.
A premature STOP codon is coded for by the substitution which leads to a truncated,, non functional protein.

Explanation

Question 27 of 31

1

What is meant by a nonsense mutation?

Select one of the following:

The same amino acid is coded for, because although the base is substituted for a different one, the codon still codes for the same amino acid due to the degenerate nature of the triplet code.
A different amino acid is coded for for that particular triplet but the protein itself still remains functional.
A premature STOP codon is coded for by the substitution which leads to a truncated,, non functional protein.

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ibs

IBS Set 1 Quiz - DNA and Gene expression

IBS Set 1 Quiz - DNA and Gene expression

Question 1 of 31

Adenine complementary pairs to what other bases in DNA and RNA?

Select one or more of the following:

Explanation

Question 2 of 31

What direction does the coding strand run in?

Select one of the following:

Explanation

Question 3 of 31

What direction does the template strand run in?

Select one of the following:

Explanation

Question 4 of 31

What is the correct process of DNA replication?

Select one of the following:

Explanation

Question 5 of 31

What is the function of Gyrase?

Select one of the following:

Explanation

Question 6 of 31

What is the function of telomerase?

Select one of the following:

Explanation

Question 7 of 31

Which type of RNA encodes the amino acid sequence of a polypeptide?

Select one of the following:

Explanation

Question 8 of 31

Which type of RNA forms a protein complex which aid in the formation of a spliceosome?

Select one of the following:

Explanation

Question 9 of 31

Which type of RNA is a component of the ribosome?

Select one of the following:

Explanation

Question 10 of 31

Which type of RNA is responsible for bringing amino acids to the ribosomes during translation?

Select one of the following:

Explanation

Question 11 of 31

What does label 1 show on the model of the gene?

Select one of the following:

Explanation

Question 12 of 31

What does label 2 show on the model of the gene?

Select one of the following:

Explanation

Question 13 of 31

What does label 3 show on the model of the gene?

Select one of the following:

Explanation

Question 14 of 31

The process of transcription is what?

Select one of the following:

Explanation

Question 15 of 31

Splicing occurs in both prokaryotic and eukaryotic transcription.

Select one of the following:

Explanation

Question 16 of 31

Select the processes which occur in the nucleus

Select one or more of the following:

Explanation

Question 17 of 31

Select the process which occurs in the cytoplasm

Select one of the following:

Explanation

Question 18 of 31

The start codon on mRNA is always what set of bases?

Select one of the following:

Explanation

Question 19 of 31

The 40s subunit of an 80s ribosome contains the P and A site where the tRNA binds.

Select one of the following:

Explanation

Question 20 of 31