Unit 1 1.3 Dna And The Production Of Protiens

Question 1

The nucleus contains all of the genetic information held on?

Answer 1

chromosomes

Question 2

Each chromosome is made up of genes that are composed of a substance called

Answer 2

DNA

Question 3

DNA has the genetic information of the cell coded into its

Answer 3

large complex molecules.

Question 4

DNA is described as a double-stranded , as it is made up of two strands which twist together to form a helical shape. DNA carries the genetic information for making __________.

Answer 4

DNA is described as a double-stranded HELIX as it is made up of two strands which twist together to form a helical shape. DNA carries the genetic information for making PROTEIN.

Question 5

The bases pair together a complementary way, A is always paired with T and G is always paired with C.
•The two strands of DNA are joined together by the complementary bases.
•It is the bases that make up the _____________^.

Answer 5

GENETIC CODE

Question 6

The genetic code allows cells to make the specific ____________it needs to function. The ____________sequence of bases on the DNA molecule codes for _____________ . Each___________base sequence on the DNA codes for an amino acid.

Answer 6

The genetic code allows cells to make the specific SPECIFIC it needs to function. The sequence of bases on the DNA molecule codes for
AMINO ACIDS. Each THREE base sequence on the DNA codes for an amino acid.

Question 7

Chains of amino acids form . A gene is a section of _____ which codes for a protein. Each gene has a code for a different protein and different species have different genes and so are able to make different proteins. There are ___ different amino acids which occur naturally.

Answer 7

Chains of amino acids form PROTIENS. A gene is a section of DNA which codes for a protein. Each gene has a code for a different protein and different species have different genes and so are able to make different proteins. There are 20 different amino acids which occur naturally.

Question 8

The genetic code on the is copied onto the _______. The sets of three on mRNA control the sequence of ________ which make up the molecule

Answer 8

The genetic code on the DNA is copied onto the mRNA The sets of three BASES on mRNA control the sequence of AMINO ACIDS which make up the PROTEIN molecule

Question 9

mRNA is copied from the DNA in the

Answer 9

Nucleus

Question 10

mRNA leaves the nucleus and attaches to a

Answer 10

ribosome.

Question 11

•mRNA code is translated into a protein on the

Answer 11

ribosome