Slides in this set

Slide 1

Preview of page 1

Subtitle…read more

Slide 2

Preview of page 2

· Provide genetic info for organism through their precise sequence
· Formed through condensation reactions…read more

Slide 3

Preview of page 3

DNA structure
· Made up of 2 strands of nucleotides
· Rungs of DNA must be the same length so base pairs must be made up of 1 double
ring base (Adenine and Guanine) and one single ring base (Thymine and cytosine)
· Adenine and thymine= complementary (2 hydrogen bonds)
· Cytosine and guanine = complementary (3 hydrogen bonds)
· Function of DNA depends on the sequence of base pairs it possesses…read more

Slide 4

Preview of page 4

Features and functions
· Very stable: can pass genetic info from generation to generation without change
· 2 separate strands joined by hydrogen bonds: strands can separate in DNA replication
and protein synthesis
· Large molecule: lots of genetic information
· Base pairs with a helical cylinder of Deoxyribose phosphate backbone: genetic
information is to some extent protected from being corrupted by outside physical and
chemical forces
· 2 complementary strands: 2 copies of same information for repair, copying and error
checking…read more

Slide 5

Preview of page 5

Allele: 1 of a number of alternative forms of a gene; An individual inherits 1 allele from
each parent
· Homologous pairs: 2 chromosomes that determine the same genetic characteristics
but this isn't the same as being identical; 1 pair is from each parent in the gametes.…read more

Slide 6

Preview of page 6

· Cancer: A group of diseases caused by a growth disorder as a result of damage to
genes that regulate mitosis and the cell cycle.
· Treatment blocks cell cycle by preventing the synthesis of the enzymes needed for
DNA replication (polymerase) which causes it to die as it cannot enter s phase and by
inhibiting the metaphase stage by inferring with spindle formation
· Disrupts cell cycle of normal cells
· Repeated treatments allow for body to recover and produce new cells without the
cancer growing back to the same size as before…read more


No comments have yet been made

Similar Biology resources:

See all Biology resources »