Ultra Structure Of Eukaryotic Cells

Question 1

Structure of ribosomes

Answer 1

Free floating in cytoplasm or attached to RER
Very small, made of protein subunits, not covered by a membrane

Question 2

Function of ribosomes

Answer 2

Site of protein production
In charge of protein synthesis

Question 3

Structure of ER

Answer 3

Membrane is a phospholipid bilayer embedded with proteins
SER- no proteins
RER- proteins on the surface

Question 4

Function of RER

Answer 4

Processes and folds proteins made on the ribosomes

Question 5

Function of SER

Answer 5

Making and processing lipids

Question 6

Structure of Golgi apparatus

Answer 6

Series of fluid filled flattened & curved sacs with vesicles surrounding the edges

Question 7

Function of Golgi apparatus

Answer 7

Processes and packages proteins and lipids, it also produces lysosomes

Question 8

Structure of Mitochondria

Answer 8

Oval shaped, bound by double membrane called the envelope. Inner membrane folder to form Cristal with matrix on the inside

Question 9

Function of mitochondria

Answer 9

Site of aerobic respiration
Contains enzymes for respiration

Question 10

Structure of Centrioles

Answer 10

Hollow cylinders containing microtubules

Question 11

Function of centrioles

Answer 11

Involved in cell division

Question 12

Structure of lysosome

Answer 12

A vesicle containing digestive enzymes bound by a single membrane

Question 13

Function of lysosomes

Answer 13

Digestive enzymes break down invading cells or worn out cell components - membrane keeps enzymes separate

Question 14

Structure of vesicle

Answer 14

Small fluid filled sac in cytoplasm with membrane
Some former by Golgi or er and some formed at cell surface

Question 15

Function of vesicle

Answer 15

Transports substances in and out of cell and between organelles

Question 16

Cytoskeleton

Answer 16

Provides mechanical strength as well as aiding transport within cells and enabling cell movement

Question 17

Structure of Plasma membrane

Answer 17

Made of lipids and proteins
On surface of animal cells
Inside of plant cells

Question 18

Function of plasma membrane

Answer 18

Regulates the movement of substances in and out of the cell
Has receptors to respond to chemicals