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WorksheetsProtein Synthesis and Mutations 1
Total questions: 15
Worksheet time: 5mins
Which of the following units are repeatedly joined together to form a strand of DNA?
nucleotides
lipids
amino acids
fatty acids
In DNA replication, if the original sequence reads AAT TTG CGC CCA ATT, the complementary DNA strand would read?
AAU UUC GCG GGU UAA
AAT TTG CGC CCA ATT
UUA AAC GCG GGU UAA
TTA AAC GCG GGT TAA
In a molecule of double-stranded DNA, the amount of CYTOSINE present is always equal to the amount of what nitrogenous base?
adenine
guanine
thymine
uracil
Why is DNA important?
because we eat it every day for energy
it serves as the blueprint for traits of all living things
it is extremely small and very long
it is in everything
Transcription is a process that in eukaryotic cells takes place in the ________.
ribosome
mitochondria
cytoplasm
nucleus
Translation is a process that in eukaryotic cells takes place in the __________.
ribosome
endoplasmic reticulum
nucleus
vacuole
For proteins to be made, DNA must be copied into________.
chromosome
gene
nucleus
RNA
The main function of tRNA is to __________.
bring amino acids from the cytoplasm to the ribosomes
string together complementary RNA and DNA strands
carry a message that, when translated, forms proteins
form a portion of ribosomes
Which of the following statements best describes why a change in only one DNA nucleotide base of a gene on the DNA strand could result in an incorrect protein being produced by the gene?
The change creates an additional mRNA strand.
The change causes cells to divide in an uneven way.
The change alters the amino acid sequence coded for by the
gene.
The change prevents mRNA from being made.
Which of the following nucleotides is NOT present in the mRNA strand after transcription?
adenine
thymine
cytosine
guanine
RNA is read by three's in sections called _________.
codons
anticodons
gene
chromosome
A mutation is a __________ in the nucleotide base sequence of a gene.
wrinkle
cut
fold
change
GAT TGA CAC (Original)
GAT GAC AC (Mutated)
The example above is an example of a what type of mutation?
point -
missense
point -
nonsense
frameshift -
insertion
frameshift -
deletion
What mutation has occurred here?
G-A-T-C-C-A
G-A-T-G-C-A
silent
point
frameshift
insertion
What amino acid is represented by the codon UUA?
Isoleucine
Leucine
Phenylalanine
Glutamine
