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WorksheetsDNA & Protein Synthesis
Total questions: 23
Worksheet time: 12mins
What type of bond holds the DNA strands together?
hydrogen
ionic
nonpolar covalent
polar covalent
How are the DNA strands arranged?
parallel
anti-parallel
perpendicular
irregularly
What molecules make up the backbone of DNA?
nucleotides and phosphates
nucleotides and sugars
sugars and nucleotides
sugars and phosphates
Why is DNA replication considered to be semi-conservative?
the parental strands are conserved in one of the new DNA molecules
each new strand contains a parental strand and a new daughter strand
nucleotides are conserved on the leading strand
nucleotides are conserved on the lagging strand
Which portions of mRNA are cut out because they do not code for proteins?
codons
anticodons
introns
exons
Which of the following is true of RNA?
contains ribose
contains thymine
is double stranded
only found in the nucleus
Which process and product are represented by the diagram?
Process: transcription
Product:
mRNA
Process:
translation
Product:
polypeptide
Process: recombination
Product:
genetic variation
Process:
replication
Product:
DNA
The central dogma of molecular biology is centered upon the process in which the information from DNA is transcribed and translated, resulting in amino acids being joined into polypeptides.
What process is described above?
transcription
translation
protein synthesis
replication
Put the steps of DNA replication in order:
A. Two new copies of DNA are created, each containing one strand from the original DNA molecule.
B. DNA Polymerase joins complementary nucleotides to the template strands.
C. DNA Helicase “unzips” DNA breaking bonds between the 2 template strands.
D. The newly created strands are “proof-read” for errors.
E. DNA Polymerase attaches (glued) to each exposed template strand during DNA ligase.
ADBEC
AEDCB
CBEDA
CEBDA
A mutation occurs in the DNA sequence of a gene, changing a single base. Which of the following outcomes is most likely to occur if this mutation happens within the coding region of a gene?
The protein will always be shorter than usual.
The protein may have a different amino acid sequence, altering its function.
The mutation will ALWAYS result in no protein being produced.
The protein will remain completely unchanged, as mutations never affect protein synthesis.
What type of RNA carries an amino acid to the organelle in charge of making a protein during translation?
mRNA
rRNA
tRNA
RNA polymerase
AUCGCCAU
