WorksheetsDNA Gene Expression and Mutations
Total questions: 21
Worksheet time: 12mins
The mutated DNA segment is TTATCGCAAG. This is an example of ___ mutation.
The diefinition of a mutation is...
a change in a DNA sequence
A change in mRNA
A change in amino acid sequence
Wolverine
A segment of DNA has base sequence GAC GAC CGC AAA ACA AGC. Due to deletion, the first base G is deleted. The likely effect of this on the coding of DNA segment is that
the first amino acid will be different and all other will be like the original polypeptide.
there will be no change in the polypeptide chain.
the whole sequence of amino acids will be changed.
the polypeptide chain will be two amino acids shorter
Mutations can be
Harmful
Neutral
Benificial
All of the above
Which type of mutations can be inherited
Mutations in somatic cells
Spontanious mutations in muscle cells
Mutations in germline cells
Induced mutations in liver cells.
The least severe form of mutation is likely to be:
a substitution of a nucleotide
a single DNA nucleotide insertion in the middle of a sequence
a loss or gain of part of a chromosome
the loss or gain of a chromosome
Match the following about mutations
mutation
a change in the DNA sequence
substitution
replacing a nucleotide with a different nucleotide
deletion
removing a nucleotide
insertion
adding a nucleotide
Match the following about mutations
gene mutation
a change in a nucleotide or a segment of DNA
chromosomal mutation
a change in structure of a chromosome
point mutation
a change in only a single nucleotide
frameshift mutation
a change that affects all amino acids after the mutation; insertions or deletions
All cells carry the entire genome of an organism apart from:
hair follicles and gametes.
skin cells and gametes.
gametes and red blood cells.
gametes.
Negative control of gene expression is mediated by __ and results in a(n) __ in the frequency of transcription.
activators, increase
activators, decrease
repressors, increase
repressors, decrease
Which of the genes below would you want to have demethylated in your body? Select all that apply.
Cancer causing genes
Genes associated with anxiety.
tumor suppressor genes
genes related to immune system function
Which of these can cause a gene to be expressed more - that is, can cause more protein to be made from it?
removal of methyl groups from the DNA
loosening of how tight the DNA is coiled around histones
both of these are correct
How can epigenetic changes be inherited?
Through changes in the DNA sequence passed from parent to offspring
Through the inheritance of acquired characteristics
Through the replication of epigenetic markers during cell division
Epigenetic changes cannot be inherited
