WorksheetsTopic 2.7: DNA Replication, Transcription & Translation
Total questions: 9
Worksheet time: 9mins
The diagram represents transcription and translation. What structures do the letters X and Y represent?
X: DNA
Y: anticodon
X: mRNA
Y: anticodon
X: DNA
Y: codon
X: mRNA
Y: codon
For what did Meselson and Stahl’s work provide evidence?
The abiotic origin of organic molecules
The cell theory
The fluid mosaic model of membrane structure
The semi-conservative replication of DNA
The gene that codes for a particular polypeptide includes the base sequence shown.
GAGTACCCT
What is the base sequence of the mRNA molecule which is complementary to this sequence?
GAGTACCCT
CTCATGGGA
GUGTUCCCT
CUCAUGGGA
Where are amino acids joined together to make polypeptides?
Nucleus
Nucleolus
Golgi apparatus
Ribosomes
The table shows some codons for five amino acids. Which of these DNA strands will code for the amino acid sequence glycine-serine-glycine?
CCUUCGCCG
CCTTCGCCG
GGAAGCGGA
CCUUCGCCU
What do DNA replication, transcription and translation have in common?
Take place in cell nucleus
Require free nucleotides
Catalysed by polymerase
Complementary base pairing
Meselson and Stahl conducted experiments using the isotopes 14N and 15N which showed that DNA replication is semi-conservative. What would they have observed about the distribution of isotopes in the DNA after one round of replication if DNA replication was conservative rather than semi-conservative?
Only 14N DNA
Only 15N DNA
All DNA half 14N and half 15N
Half the DNA with only 14N and half with only 15N
Which are necessary to make DNA replication semi-conservative?
I. Separation of the strands by RNA polymerase
II. Complementary base pairing
III. Use of a pre-existing strand as a template
I and II only
I and III only
II and III only
I, II and III
This is a sequence of nucleotides from a section of mRNA.
AUGAAACGCACGCAG
From which DNA sequence has it been transcribed?
ATGAAACGCACGCAG
UACUUUGCGUGCGAC
TACUUUGCGTGCGTC
TACTTTGCGTGCGTC
