Cell structures-Eukaryotic animal cells

Question 1

where is the nucleolus located?

Answer 1

In the nucleus

Question 2

Function of nucleolus

Answer 2

Where ribosomes are made

Question 3

What is the nucleus enclosed/surrounded by?

Answer 3

The nucleus is surrounded by a double membrane(2 membranes)called the envelope,which contains pores enabling molecules to enter and leave the nucleus.

Question 4

What does the nucleus contain and what are their functions?

Answer 4

1)The nucleus contains DNA wrapped around histone proteins in a complex called chromatin.
2)The nucleus also contains a nucleolus which is where ribosomes are made

Question 5

What does the rough endoplasmic reticulum look like?

Answer 5

a series of flattened sacs enclosed by a membrane with ribosomes on the surface.

Question 6

Function of Rough endoplasmic reticulum?

Answer 6

Proteins are made on these ribosomes that are transported through the ER to other parts of the cell

Question 7

What does the smooth endoplasmic reticulum look like and its function?

Answer 7

a system of membrane bound sacs but w/o any attached ribosomes. The SER produces and processes lipids(eg reproductive hormones)

Question 8

what does golgi apparatus look like?

Answer 8

a series of fluid-filled,flattened and curved sacs with vesicles surrounding the edges

Question 9

function of golgi apparatus

Answer 9

modifies and packages proteins in vesicles for transport.It also produces lysosomes.

Question 10

what does a lysosome look like

Answer 10

spherical sacs- contains digestive enzymes and bound by a single membrane

Question 11

function of lysosome

Answer 11

Involved in the breakdown of unwanted structures within the cell and destruction of whole cells when old cells are to be replaced during development

Question 12

what does mitochondria look like

Answer 12

oval shaped and bound by a double membrane.
the inner membrane is folded to form projections called cristae

Question 13

function of mitochondria

Answer 13

site of the later stages of aerobic respiration

Question 14

what do centrioles look like

Answer 14

They are hollow cylinders made up of a ring of 9 protein microtubules

Question 15

function of centrioles

Answer 15

Involved in cell division(mitosis)

Question 16

function of ribosomes

Answer 16

site of protein synthesis
80S ribosomes-eukaryotes
70S ribosomes-prokaryotes

Question 17

function of cell surface membrane

Answer 17

allows molecules to go in and out of the cell.
made up of a phospholipid bilayer that is partially permeable