2010

Question 1

Secondary spermatocytes undergoes second half of division to form…?

Answer 1

Spermatids

Question 2

In meiosis what stages does centromere divide?

Answer 2

Anaphase II

Question 3

In what stage does crossing over occur?

Answer 3

Prophase 1

Question 4

How does cell ensure that the code is read in the right direction?

Answer 4

They have start code

Question 5

Proflavin is chemical which alters the base sequence of DNA, what is name to this change?

Answer 5

Mutation

Question 6

How does protein synthesis work?

Answer 6

Switches on gene which codes for chain
mRNA made
Transcription
nRNA is translated

Question 7

Disadvantage of adult human producing beta chains of haemoglobin

Answer 7

Reduce oxygen supplies to tissues

Question 8

Suggest why puppy coats not the same?

Answer 8

Mutation
Environmental influence
Different ages

Question 9

What does restriction endonuclease do?

Answer 9

Cuts DNA into smaller segments

Question 10

What does DNA lipase do?

Answer 10

Joins sections of DNA together

Question 11

What does reverse transcriptase do?

Answer 11

Enzyme used RNA as template for making DNA

Question 12

What do marker genes do?

Answer 12

Enables detection of bacterium which has taken up genetically modified plasmid

Question 13

Aims of human genome project?

Answer 13

So could find all the gene sequences in human body

Identify genes formed by bases and there location

Question 14

Uses I’d information gained from genome project

Answer 14

Checking embryo before implantation
Risk of developing condition
Forensic

Question 15

Where are spermatozoa produced?

Answer 15

Seminiferous tubule in testes by spermatogenesis