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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

4.1.1 Prokaryotic DNA – Unit exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
IGCSE Biology 17.1 DNA, Chromosomes, genes and ALLELES (X, Y) - Question 8
IGCSE Biology 17.1 DNA, Chromosomes, genes and ALLELES (X, Y) - Question 8
A
B
C
D
2.
Why is a log scale used for bacterial growth curves?
Numbers cover many orders of magnitude
It makes growth look slower
Bacteria cannot be counted otherwise
It shows dead cells
3.
IGCSE Biology 21.1 Genetic modification - Question 3
IGCSE Biology 21.1 Genetic modification - Question 3
A
B
C
D
4.
Which statement best describes Random fertilisation?
Which statement best describes Random fertilisation?
Any sperm can fuse with any egg.
Chromosome with new allele combination.
Failure of chromosomes to separate.
Random orientation of homologue pairs.
5.
Premarital screening in Saudi Arabia tests for certain recessive genetic disorders. Why is the risk of these disorders higher in marriages between relatives?
Because consanguineous marriage increases the chromosome number of the children
Because recessive alleles become dominant in consanguineous marriages
Because a carrier (Aa) shows symptoms and passes them on directly
Because the spouses are more likely to carry the same recessive allele (Aa), so it can appear in the children as two copies
6.
A group of biologists wishes to isolate an antifreeze gene found in a cold-water species of fish and introduce it into the genome of a different organism. Which of the following techniques must they use?
SAT Biology - Question 140
A
B
C
D
E
7.
Mitochondria and chloroplasts both
synthesise lipids only
lack membranes
contain their own DNA and ribosomes
are found in all prokaryotes
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.
IGCSE Biology 17.4 Meiosis - Question 10
IGCSE Biology 17.4 Meiosis - Question 10
A
B
C
D
10.

Penicillin is effective only when bacteria are

dormant
dead
growing and making new cell walls
inside viruses
11.
Complete the statement: The genetic code is nearly ______.
Complete the statement: The genetic code is nearly ______.
universal
Universal genetic code
LUCA
Shared derived trait
12.
The Human Genome Project was completed in 2003. True or false?
True
False
False, in 1953
True only for chromosome 1
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Part of 4. Genetics, Variation and Interdependence — see every lesson and quiz in this unit.
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