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WorksheetsIB Biology unit 2.7 AHA
Total questions: 12
Worksheet time: 8mins
The sequence of nucleotides in a section of RNA is:
GCCAUACGAUCG.
What is the base sequence of DNA sense strand?
CGGUAUGCUAGC
GCCATACGATCG
CGGTATGCTAGC
GCCAUACGAUCG
A certain gene in a bacterium codes for a polypeptide that is 120amino acids long.
How many nucleotides are needed in the mRNA to code for this polypeptide?
30
40
360
480
What enzyme is usd in transcription but NOT in translation?
DNA Polymerase
Helicase
Protease
RNA polymerase
If mRNA has a codon CAU the corresponding anticodon on the tRNA molecule is...
(a)
Where does RNA Polymerase bind during the process of transcription?
The polysome
The operator
The promoter
The initiator
Wat sequence of processes is carried out by the structure labelled X during Translation?
Combining with an amino acid and then binding to an anticodon
Binding to an anticodon and then combining with an amino acid
Binding to a codon and then combining with an amino acid
Combining with an amino acid and then binding to a codon
What is a codon?
A sequence of nucleotides on rRNA that corresponds to an amino acid
A sequence of nucleotides on mRNA that corresponds to an amino acid
A sequence of nucleotides on tRNA that corresponds to an amino acid
A sequence of nucleotides on DNA that corresponds to an amino acid
The percentage of thymine in the DNA of an organism is approximately 30%. What is the percentage of guanine?
70%
30%
40%
20%
The following diagram shows a short stretch of DNA. What bases are indicated by labels Y and Z?
Thymine
Adenine
Thymine
Guanine
Uracil
Guanine
Uracil
Adenine
Which molecules form the nucleotide marked in the diagram?
phosphate, deoxyribose and nitrogenous base
phosphorus, ribose and nitrogenous base
phosphorus, deoxyribose and guanosine
phosphate, ribose and guanine
Which enzyme catalyzes the elongation of the leading strand?
(a)
What is replicated by a semi-conservative process?
(a)
