B: DNA structure Flashcards
The chemical that is the basis of biological inheritance.
DNA
Spell the full form of DNA.
Deoxyribonucleic acid
Where is DNA found?
In the nucleus of a cell
A section of dna that determines a particular feature in an organism.
Gene
What do genes instruct cells to do?
Produce particular proteins
Each chromosome contains how many dna molecules
One
DNA is coiled around what?
Proteins called histones
A molecule of DNA is made up from two strands of molecular groups called…
Nucleotides
Nucleotides contain a sugar, a phosphate group, and a nitrogen containing group called a…
base
Name the four bases of a nucleotide.
(G) guanine
(A) adenine
(C) cytosine
(T) thymine
Nucleotides with adenine are always opposite nucleotides with…
Thymine
Nucleotides with cytosine are always opposite nucleotides with…
Guanine
What is the ‘base-pairing rule’?
Complementary bases always bind with each other
The two DNA strands are held together by…
Hydrogen atoms between complementary base pairs
The complementary base pair of adenine
Thymine
