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WorksheetsGenetics Revision
Total questions: 10
Worksheet time: 20mins
In messenger RNA, adenine base pairs with:
Thymine
Uracil
Cytosine
Guanine
The enzyme tasked with unwinding DNA during DNA synthesis is:
DNA ligase
DNA polymerase
DNA helicase
DNA phosphate
Which of the following is NOT true of codons?
They are instructions contained within a strand of mRNA
They are a triplet code used to make polypeptides
They code for more than one amino acid
There are start and stop codons
What is translation?
It involves DNA being used to create mRNA
It involves making another copy of the DNA strand
It is the process of replacing thymine with uracil
It is the production of polypeptides from mRNA
Which of the following is NOT true of mutations?
If they occur in germline cells they can't be passed to offspring
They are changes in the genetic material of an organism
They can involve duplication or deletion of a section of DNA
They can have negative, positive or neutral effects on an organism
A missense mutation is one in which:
There is a base substitution that results in an amino acid replacement at that location
There is a base substitution that results in a Stop codon and shortens the peptide
There is a base substitution that does not result in a new amino acid
There is a frameshift and all amino acids after that point differ
On the gel electrophoresis output, which labelled band travelled the furthest through the gel?
A
B
C
D
Below is a sequence of template DNA. What would the mRNA strand look like if the DNA sequence was transcribed?
3'- ATGCCGTAGCGGG -5'
5'- TACGGCATCGCCC -3'
5'- UACGGCAUCGCCC -3'
3'- ATGCCGTAGCGGG -5'
3'- AUGCCGUAGCGGG -5'
The 3 components of a nucleotide are:
Protein, Sugar and Phosphate
Sugar, Phosphate and Nitrogenous Base
Phosphate, Nitrogenous Base and Protein
Thymine, Sugar, Protein
What is incomplete dominance?
The heterozygote will have the same phenotype as the homozygous dominant
The heterozygote has an intermediate of the two phenotypes observed in the homozygotes
The heterozygote displays phenotypic expression of both allele types
The recessive trait shows through half the time in the heterozygote
