1.2 Organelles

Question 1

Ribosomes (both)

Answer 1

translation process. Made of RNA + proteins

Responsible for protein synthesis

Question 2

Plasma Membrane (both)

Answer 2

semi permeable and selective barrier surrounding the cell

Question 3

Cytoskeleton ( both)

Answer 3

provides internal structure and mediates intracellullar transport ( less developed in prokaryotes)

Question 4

Vesicles

Answer 4

transport materials inside of a cell

Question 5

Nucleus

Answer 5

Stores genetic material ( DNA) as chromatin; nucleolus is site of ribosome assembly

Question 6

Endoplasmic Reticulim

Answer 6

Transport materials between organelles

Question 7

Golgi Apparatus

Answer 7

Involved in the sorting, storing, modification and export of secretory products

Question 8

Mitochondrion

Answer 8

site of aerobic respiration ( ATP production)

Question 9

Peroxisome

Answer 9

Catalyses breakdown of toxic substances and other metabolites

Question 10

Centrosome

Answer 10

Radiating microtubules from spindle fibres and contribute to cell division

Question 11

Plants: Chloroplast

Answer 11

site of photosyntesis; manufactured organic molecules are stored in various plastids

Question 12

plants: Vacuole

Answer 12

mantains hydrostatic pressure( animal cells may have small, temporary vacuoles)

Question 13

Plants: Cell Wall

Answer 13

provides support and mechanical strength; prevents excess water uptake

Question 14

Animals only: Lysosome

Answer 14

Breakdown of macromolecules