Pages in this set

Page 1

Preview of page 1
Thread of life revision notes





Page 2

Preview of page 2
Thread of life revision notes




What is a genome?
A genome is all the genetic material contained in the chromosomes of an organisms.
Dna carries our genetic code and contains the instructions for making proteins via our genes.
Proteins have several different vital uses in our body, but one of…

Page 3

Preview of page 3
Thread of life revision notes




-Reactions of amino acid 13.9
Proteins are replaced in all of us continuously in all of us. It is important when hormones and
enzymes are made when they are needed and destroyed once their jobs are done
-proteins are replaced from the food we eat,…

Page 4

Preview of page 4
Thread of life revision notes




Tertiary structure the chains are folded up further and stabilised by bonds that occur between the r group
of the amino acids in the chain.

Instantaneous dipole ­ induced dipole bonds between the nonpolar side chains on amino acids
such as phenylalanine and leucine. The…

Page 5

Preview of page 5
Thread of life revision notes




it.This region is called the active site.


The bonds that bind the substrate to the active site have to be weak so the binding can be readily
reversed when the products need to leave the active site after the reaction. The bonds are usually
hydrogen…

Page 6

Preview of page 6
Thread of life revision notes




Activation enthalpy in chemical ideas 10.1 and 10.2,catalysts chemical ideas 10.5 and 10.6
Factors that affect the performance of the enzymes
-if an enzymes active site contains ionisable groups the enzymes actions will be affected by a
change in Ph. Eg. If there is a…

Page 7

Preview of page 7
Thread of life revision notes




One of 4 bases (represented by A, T, C and G) is condensed to a deoxyribose unit in the
sugar phosphate backbone. Each sugar/phosphate/base group is called nucleotide.
DNA consists of 2 strands twisted in a helical form with sugar-phosphate backbone around
the outside, held…

Page 8

Preview of page 8
Thread of life revision notes




Base pairing
Pairs of bases in DNA can form hydrogen bonds together-adenine and thymine, cytosine and
guanine.




Chemists have found out that base pairing enables them to do 2 things
One strand with the aid of enzymes can synthesise and complementary copy of itself for…

Page 9

Preview of page 9
Thread of life revision notes




The mRNA carries a code in the sequence of bases that corresponds to a particular amino
acids.-the code is a triplet code, with 3 bases coding for each amino acid .The group of three bases
is called a codon
Because there is 64 arrangements of…

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »