Biotechnology What you need to know

hastinesshandyBiotechnology

Oct 23, 2013 (4 years and 17 days ago)

84 views

Biotechnology



What you need to know


The numbers refer to pages in ‘Leckie & Leckie Success Guide’


Living factories

(p84
-
85)


G

State that the raising of dough and the manufacture of beer and
wine depend on yeast









G

Explain that yeast is a singl
e
-
celled fungus which can use sugar as
food



G

State the process of fermentation of glucose by yeast, using a
word equation










C

Describe the process of anaerobic respiration and compare it with
aerobic respiration










C

Describe how brewers
provide the best growing conditions for
yeast



C

Explain what is meant by the term ‘batch processing’




C

Explain the need for malting of barley before use by the brewing
industry



G

State that making cheese and yoghurt depends on the activities of
bact
eria



G

State that the souring of milk is a fermentation process




C

Explain the souring of milk by bacterial fermentation of lactose



Problems and profit with waste

(p10
-
13, 86
-
89)


G

Give some examples of the ways in which untreated sewage can
damage
the environment









G

Give two examples of diseases which can be spread by untreated
sewage



G

Describe the main precautions which should be taken during lab
work with micro
-
organisms









C

Explain precautions which have to be taken to destroy res
istant
fungal and bacterial spores









C

Describe the part played by bacteria in the process of decay and

recycling of carbon and nitrogen

















C

Explain that during the process of decay, micro
-
organisms are
breaking down organic ma
terials during respiration to obtain their
energy




G

State that during sewage treatment, decay micro
-
organisms break
down the sewage into harmless products







C

Explain why complete breakdown of sewage is only possible in
aerobic conditions










G

Describe how oxygen is provided for micro
-
organisms during
sewage treatment










C

Explain why a range of micro
-
organisms is needed to break down
the range of materials in sewage








G

Give two examples of useful products which are made from waste

materials by the action of micro
-
organisms






C

Explain the advantages of upgrading waste by increasing its energy
or protein levels










G

State that alcohol and methane are products of fermentation



G

Explain the advantages of producing fuel fro
m fermentation rather
than from fossil sources









G

State that under suitable conditions micro
-
organisms can
reproduce asexually very rapidly









G

State that micro
-
organisms can be harvested to provide protein
rich food for animals or man









Reprogramming microbes

(p90
-
91)


G

State that bacteria are controlled by their chromosomes




C

Explain how genetic engineering can be achieved by altering

chromosomes










G

State that pieces of chromosome can be transferred to bacteria
from a differ
ent organism and so allow the bacteria to make
different substances



C

State that as a result of genetic engineering bacteria may produce
increased quantities of products and speed up processes





C

Explain the advantages of genetic engineering compared
with
selective breeding










G

Give some examples of the products of genetic engineering and
their uses



C

Explain the increasing need for insulin produced by biotechnology



G

State that biological detergents contain enzymes produced by
bacteria



C

Describe the advantages of using low
-
temperature biological
detergents

containing enzymes









C

Explain how biological detergents ‘digest’ stains with the use of
enzymes



G

State that an antibiotic is a chemical which prevents growth of
micro
-
organism
s











C

Explain why a range of antibiotics is needed in the treatment of
bacterial

diseases










C

Describe the advantages of using immobilisation techniques



C

Explain the advantages of continuous
-
flow processing (allowed by


immobilisation) ov
er batch processing