cells

Question 1

what is a prokaryotic cell?

Answer 1

a cell that has circular DNA that is not surrounded by a membrane bound nucleus e.g. bacteria
DNA is shorter

Question 2

what is a eukaryotic cell?

Answer 2

a cell that has linear DNA that is surrounded by a membrane bound nucleus e.g. animals ,plant, fungi
DNA is longer

Question 3

what is linear DNA associated with?

Answer 3

histone proteins

Question 4

describe the structure of a nucleus

Answer 4

has a double membrane, nuclear pores and a dark staining region called the nucleolus

Question 5

what is the function of the nucleus?

Answer 5

to store the cells genetic material (DNA) and control the production of proteins

Question 6

what is the function of nucleolus?

Answer 6

to make ribosomal RNA (rRNA) which is used to make ribosomes

Question 7

what is the function of the golgi body?

Answer 7

. receives proteins from the rER and lipids from the smooth endoplasmic reticulum.
. the proteins/lipids are then modified and processed into glycoproteins/glycolipids.
the golgi body then packages these proteins and lipids into vesicles

Question 8

what are lysosomes?

Answer 8

they are vesicles produced by the Golgi body that contain enzymes (mainly proteases and lipases). they also contain an enzyme called lysozyme which hydrolyses the cell wall of bacteria