BIO- CELLS

Question 1

Which cell has membrane-bound organelles?

Answer 1

Eukaryotic cell

Question 2

What is the largest organelle? What is around it?

Answer 2

.Nucleus.
.Has a nuclear envelope surrounding it

Question 3

What is the function of the nucleus?

Answer 3

Controls the cells activities by controlling the transcription of DNA

Question 4

What is the nuclear envelope and its function?

Answer 4

The nuclear envelope is a double membrane bound organelle that has nuclear pores which allow movement of substances eg. mRNA

Question 5

Where is the nucleoplasm located and what is its texture?

Answer 5

. Inside the nucleus
. Is a gel-like substance

Question 6

What is Mitochondria?

Answer 6

. Has a double membrane
. produces ATP (energy) during aerobic respiration

Question 7

Where can mitochondria be found?

Answer 7

In cells that require a lot of energy for processes (eg. muscle cells or the intestine)

Question 8

Describe the structure of the Mitochondria

Answer 8

1. Has an outer membrane,
2. inner membrane,
3. cristae (folds within the mitochondria which contain enzymes),
4. Matrix

Question 9

What does SER stand for and describe its structure

Answer 9

SER= Smooth Endoplasmic Reticulum
Tubular structure (like a log)

Question 10

What is SER involved in?

Answer 10

Lipid Synthesis (MAKING of Lipids) and PROCESSING of lipids.

Question 11

Why is SER smooth?

Answer 11

Because it has no ribosomes on its surface

Question 12

Describe the meaning of RER and its structure

Answer 12

RER= Rough Endoplasmic Reticulum

Has ribosomes attached on its surface and looks like a dark blob (through microscope).

Question 13

What is the RER involved in?

Answer 13

The folding and processing of proteins (that are made by ribosomes)