GCSE - Molecules of life

HideShow resource information
  • Created by: Anjelala
  • Created on: 01-11-13 21:29
Number of mitochondria in the cytoplasm of a cell depends on...
the activity of the cell becuase respiration happens in mitochondria
1 of 20
Name 2 cells that have large numbers of mitochondria...
Liver and muscel cells.
2 of 20
Why do liver and muscel cells have large amounts of mitochondria?
Because the liver carries out many functions +muscel cells need to contract. So they both need lots of energy!
3 of 20
Wha are ribosomes?
They are the site of protein synthesis
4 of 20
Why can't you see ribosomes with a light microscope?
Because they are smaller than mitochondria!
5 of 20
Where are ribosomes found?
Ribsomes are found in the cytoplasm of a cell.
6 of 20
What does a nucleus contain?
Nucleus contain genes.
7 of 20
3 facts about genes are...
1) Each gene is a section of a chromosome made of DNA 2) Each gene codes for a particular protein. 3) Each gene contains a different sequence of bases.
8 of 20
Explain the structure of DNA...
DNA is made of 2 strands coiled to form a double helix, each strand contains chemicas called bases.
9 of 20
How many different bases are there in the structure of a DNA ?
4 dfferent types of bases.
10 of 20
Explain how the bases fit into the structure of DNA
there are 4 types of bases with cross links between the strands formed by pairs of bases.
11 of 20
What are the four bases in DNA called?
4 bases in DNA are called : A,T,C and G.
12 of 20
What does complimentary base pairing mean?
Means that the cross links holdng the two strands together are always between the same bases. A-T and G-C.
13 of 20
What does the DNA base code do?
DNA base code controls which protein is made.
14 of 20
What are Proteins?
> they are made of long chains of amino acids >They can be structural ,hormones,carrier molecules or enzymes.
15 of 20
why does the DNA base code control which proteins are made?
Because the base sequence, codes for the amino acid sequence in the protein . Each amino acid is coded for by a sequence of 3 bases.
16 of 20
Who discovered the structure of the DNA?
Watson and Crick discoverd the structure of DNA
17 of 20
How did Watson and Crick discover the structure of DNA?
By using data from other scientists .
18 of 20
What were the 2 most important data Watson and Crick used?
1) Photos taken using X-ray showing DNA had 2 chains wound in a helix (2)Data indicating that the bases occured in pairs
19 of 20
Why is there a long delay between a dicovery and the award of Prizes?
Because other scientists need to check the discovery to make sure that it is correct.
20 of 20

Other cards in this set

Card 2

Front

Name 2 cells that have large numbers of mitochondria...

Back

Liver and muscel cells.

Card 3

Front

Why do liver and muscel cells have large amounts of mitochondria?

Back

Preview of the front of card 3

Card 4

Front

Wha are ribosomes?

Back

Preview of the front of card 4

Card 5

Front

Why can't you see ribosomes with a light microscope?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA and inheritance resources »