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Course: AQA A Level Biology 7402
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AQA A Level Biology 7402

1. Biological Molecules

0/102

2. Cell Structure

0/95

3. Exchange and Transport

0/98

4. Genetics, Variation and Interdependence

0/94

5. Energy Transfers In and Between Organisms (A Level only)

0/63

6. Organisms Respond to Changes in their Environments (A Level only)

0/93

7. Genetics, Populations, Evolution and Ecosystems (A Level only)

0/55

8. The Control of Gene Expression (A Level only)

0/72

9. Exam Guidance and Skills

0/38
Quiz

4.1.6 The Triplet Code – Exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
How many bases code for one amino acid?
1
2
3
4
2.
The code is described as degenerate because
it changes over time
most amino acids have more than one codon
codons overlap
it differs between species
3.
Which statement best describes Degenerate code?
Most amino acids are coded by more than one codon.
The DNA strand that is read (antisense) and to which mRNA is complementary.
The synthesis of mRNA from a DNA template in the nucleus, catalysed by RNA polymerase.
A sequence of three bases on mRNA that codes for one amino acid or a stop signal.
4.
Which statement best describes Genetic code?
The synthesis of mRNA from a DNA template in the nucleus, catalysed by RNA polymerase.
The rules by which base triplets in mRNA specify amino acids.
The three bases on a tRNA molecule complementary to an mRNA codon.
A change in the base sequence of DNA, such as a substitution, insertion or deletion.
5.
The sequence of bases in DNA codes for:
Cell size
Fat storage
The type of sugar
The order of amino acids in a protein
6.
The start codon AUG codes for
methionine
glycine
no amino acid
a stop signal
7.
The genetic code is described as redundant because
each codon codes for many amino acids
codons differ in every organism
codons overlap
more than one codon can code for the same amino acid
8.
An allele that codes for all actin molecules to be synthesized in linear chains would result in
SAT Biology - Question 185
A
B
C
D
E
9.
According to the comparison table in this lesson, what is the lac operon of Genes code for?
According to the comparison table in this lesson, what is the lac operon of Genes code for?
lac vs trp operon
Lactose inactivates repressor → on
Lactose digestion enzymes
Off
Inducible
10.
Which statement best describes Universal genetic code?
Which statement best describes Universal genetic code?
Last universal common ancestor.
All life descends from shared ancestors.
Feature shared by a group from their ancestor.
Shared by almost all organisms.
11.
According to the comparison table in this lesson, what is the Level of Universal genetic code?
According to the comparison table in this lesson, what is the Level of Universal genetic code?
Evidence of common ancestry
Cellular
Genetic
Metabolic
Molecular
12.
Complete the statement: The genetic code is nearly ______.
Complete the statement: The genetic code is nearly ______.
universal
Universal genetic code
LUCA
Shared derived trait
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Part of 4. Genetics, Variation and Interdependence — see every lesson and quiz in this unit.
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