Things Ive Got Wrong In Past Papers Flashcards

1
Q

What enzymes are used in genetic engineering?

A

Restriction enzyme (cut)

Ligase (paste)

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2
Q

What conditions are suitable for an industrial fermenter ?

A

Aseptic precautions, nutrients, optimum pH and temperature, oxygenation and agitation (stirring)

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3
Q

What is urea?

A

It is made in the liver by the breakdown of amino acids.
This is removed from the bloodstream by the kidneys.
It then leaves the body in urine.

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4
Q

How is yogurt made?

A

Bacteria ferment milk

Milk is pasteurised to kill pathogens
LACTOBACILLUS bacteria is added and the mixture is incubated in a fermenter
Lactic acid is produced which causes milk to clot and thicken.

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5
Q

How is yogurt made?

A

Bacteria ferment milk

Milk is pasteurised to kill pathogens
LACTOBACILLUS bacteria is added and the mixture is incubated in a fermenter
Lactic acid is produced which causes milk to clot and thicken.

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6
Q

Purpose of dietary fibre

A

Aids the movement of food through gut

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7
Q

Purpose of calcium and iron mineral ions?

A

Calcium- teeth and bones

Iron- make haemoglobin for healthy blood

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8
Q

What’s bile?

A

Made in the liver, stored in the gall bladder

Neutralises stomach acid and emulsifiers fats

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9
Q

What is the role of viruses and plasmids in genetic engineering?

A

Vectors-take up pieces of DNA, the insert this recombinant DNA into other cells.

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