Other slides in this set

Slide 2

Preview of page 2

Here's a taster:

Topic Overview
· Gamete structure and function
· Fertilisation
· Mitosis/meiosis
· Cell cycle
· Stem cells
· Gene expression
· Specialised cells (working together)
· Environmental/genetic factors…read more

Slide 3

Preview of page 3

Here's a taster:

Prokaryotic cells (before the nucleus)
· Small
· DNA not associated with any proteins and lies free in
the cytoplasm
· Bacteria and cyanobacteria
· Cell wall…read more

Slide 4

Preview of page 4

Here's a taster:

Eukaryotic cells (true nucleus)
· Cells containing membrane-bound organelles such as
nuclei and mitochondria
· Plant and animal cells
· Doesn't necessarily have a cell wall
·Larger…read more

Slide 5

Preview of page 5

Here's a taster:

Movement in cells
· Continual movement of molecules in cells
· RNA ­ nucleus > ribosomes (protein synthesis)
· Enzymes, hormones, signal proteins released from
cell
· Movement of proteins requires ER, Golgi apparatus
and vesicles
· Rough ER has attatched ribosomes. Ribosomes make
proteins and ER transports them
· Transport vesicles move molecules between
locations inside the cell…read more

Slide 6

Preview of page 6

Here's a taster:

Ovum adaptations
· Large ­ cytoplasm has room for a large protein and lipid food store
· Incapable of independent movement - wafted
along oviduct from ovary to uterus by ciliated cells and muscle
contractions
· Surrounded by jelly-like zona pellucida ­ digested
by sperm during fertilisation. Layer thickens after the first sperm has fused
with membrane, preventing entry to any further sperm.
· Releases chemicals to attract sperm
· Haploid nucleus ­ contains only half of the genetic material
required for humans, 23 single chromosomes, as when the nuclei fuse
there will be a full set of DNA…read more

Slide 7

Preview of page 7
Preview of page 7

Slide 8

Preview of page 8
Preview of page 8

Slide 9

Preview of page 9
Preview of page 9

Slide 10

Preview of page 10
Preview of page 10

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »