2.1.1 cell structure

Question 1

importance of nuclear pores

Answer 1

channels allowing mRNA and ribosomes to travel out of the nucleus, as well as allowing enzymes (eg. DNA polymerases) and signalling molecules to travel in.

Question 2

what are chromosomes made up of

Answer 2

linear DNA tightly wound around histones

Question 3

which organelles ae involved in protein synthesis

Answer 3

• nucleus
• ribosomes
• RER
• Golgi apparatus
• cell surface membrane

Question 4

where are ribosomes produce

Answer 4

nucleolus

Question 5

cell wall of bacteria are made of

Answer 5

peptidoglycan

Question 6

outline importance of cytokines

Answer 6

• strength and support
• intracellular movement
• cell movement

Question 7

name the two types of electron microscopes

Answer 7

T(transmission)EM

S(scanning)EM

Question 8

describe process of protein synthesis

Answer 8

nucleus , contains gene (for protein) transcription= mRNA ; mRNA leave through nuclear pores to ribosomes on rough endoplasmic reticulum translation of mRNA vesicles formed for transport (of protein). Golgi (apparatus / body), processes / modifies / (re)packages, proteins vesicles) the can be kept with in cell or undergo exocytosis

Question 9

what a microtubule

Answer 9

hollow tubular strands mostly made up of tubulin (a protein). using ATP organelles an components with the cell are moved along the fibres around the cell.

Question 10

what a microfilament

Answer 10

solid stands mostly made up of actin can cause cell to movement and the movement of some organelles within cells by moving against each other