Paper 1: DNA

Question 1

What is DNA?

Answer 1

The genetic material found in chromosomes in the nuclei of cells

Question 2

What does the nucleus in the DNA contain?

Answer 2

Chromosome

Question 3

What does a chromosome contain in a DNA cell?

Answer 3

A string of genes

Question 4

What is a gene?

Answer 4

A short piece of DNA that codes for a specific protein

Question 5

What is the structure of DNA?

Answer 5

A long, coiled molecule formed from strands that are twisted into a double helix

Question 6

What are the 4 different bases in DNA?

Answer 6

Adenine (A)
Thymine (T)
Cytosine (C)
Guanine (G)

Question 7

What do the bases form?

Answer 7

Complementary Pairs

Question 8

What are the complementary bases?

Answer 8

A & T
C & G

Question 9

What are between the base pairs that hold the DNA strands together?

Answer 9

Weak hydrogen bonds

Question 10

How do you extract DNA from fruit?

Answer 10

1) grind the fruit with sand
2) add a detergent to break open membranes
3) add ice-cold alcohol so that DNA precipitates out

Question 11

What is a genotype?

Answer 11

An organism’s specific genetic code

Question 12

What is a phenotype?

Answer 12

How this code is expressed in a physical characteristics