[Maximum number: 1]
Which types of organisms are used in genetic modification because they have plasmids?
A
arachnids
B
bacteria
C
myriapods
D
ferns
[Maximum number: 3]
Microbiologists test strains of bacteria for antibiotic resistance.
They do this by soaking paper discs in antibiotics and placing them on bacteria growing in Petri dishes.
The paper discs in the centre of Petri dishes E and F in Fig. 2.1 have been soaked in penicillin.
Fig. 2.1
(a)
Some bacteria and viruses cause disease but many are useful to the biotechnology industry.
Explain why bacteria are useful in biotechnology.
[ 3 ]
[Maximum number: 3]
Bacteria are used in many biotechnological processes.
(a)
Explain why bacteria are useful in biotechnology.
[ 3 ]
(a)
State why bacteria are useful in biotechnology.
[ 3 ]
[Maximum number: 1]
Some of the characteristics of bacteria are listed.
1 can make complex molecules
2 can reproduce quickly
3 have cytoplasm
4 may cause diseases
Which characteristics make bacteria useful in biotechnology and genetic engineering?
A
1, 2, 3 and 4
B
1 and 2 only
C
2 and 3 only
D
3 and 4 only
[Maximum number: 1]
The diagram shows the structure of a bacterial cell.
The presence of structure X in the bacterial cell is one reason why bacteria are used in genetic engineering.
What is structure X?
A
endoplasmic reticulum
B
mitochondria
C
plasmid
D
ribosome
[Maximum number: 1]
What is a disadvantage of using bacteria to produce human insulin?
A
few ethical concerns
B
genetic code shared with other organisms
C
they contain plasmids
D
they mutate frequently
[Maximum number: 1]
Which structures, found in bacteria, make them useful in genetic engineering?
A
cell walls
B
membranes
C
plasmids
D
mitochondria
[Maximum number: 1]
Why are bacteria useful in biotechnology and genetic engineering?
A
Bacteria do not have cell vacuoles.
B
Bacteria do not have mitochondria.
C
Bacteria have cell walls.
D
Bacteria share their genetic code with all other organisms.
[Maximum number: 1]
Which feature of bacteria makes it possible for them to be used to produce human insulin?
A
Bacteria possess plasmids.
B
Bacteria possess exactly the same DNA base sequences as humans.
C
Bacteria possess the same genes for insulin.
D
Bacteria possess the same number of chromosomes as humans.