Cell organelles

Question 1

The nucleus typically occupies about _____ of the volume of a cell

Answer 1

10%

Question 2

_____________ is a double membrane that surrounds the nucleus

Answer 2

Nuclear envelope. They have pores which allow the passages of some molecules between the nucleus and the cytoplasm

Question 3

________ is an organelle within the nucleus whose function is to synthesise the components of ribosomes

Answer 3

Nucleolus. It is not membrane bound

Question 4

________ is a nucleus component that consists of DNA molecules bound with protiens called HISTONES

Answer 4

Chromatin(page 138).

Question 5

How does the chromatin act before and after a cell division?

Answer 5

Before:loosely dispersed throughout the nucleus
After:condenses into distinct, recognisable structures called chromosomes

Question 6

__________ are the sites of most of the reaction of aerobic respiration.

Answer 6

Mitochondria

Question 7

How many membranes surround the mitochondria?

Answer 7

two

Question 8

The inner membrane of mitochondria is folded into _______ to increase the available surface area.

Answer 8

Cristae. It is the partial partitions in mitochondria

Question 9

_______ is where some of the reactions of aerobic respiration take place in mitochondria

Answer 9

Fluid matrix

Question 10

What do we call the energy storage molecule of cells?

Answer 10

ATP

Question 11

_________ are the sites of protein synthesis

Answer 11

Ribosomes

Question 12

True or false. Ribosomes can be found free in the cytoplasm.

Answer 12

True. But they are bound to the membrane system of endoplasmic reticulum

Question 13

Each ribosome comprises ______ number of subunits
A. 3
B.2
C.4
D.5

Answer 13

B.2
RNA and protein. This subunits are manufactured in the nucleolus

Question 14

______ is a membrane system found throughout the cytoplasm of eukaryotic cells

Answer 14

Endoplasmic reticulum

Question 15

________ is a type of endoplasmic reticulum that HAS RIBOSOMES on its surface and is responsible for the manufacture and transport of proteins

Answer 15

Rough endoplasmic reticulum

Question 16

Protein molecules made by the ribosomes on the rough ER pass through small pores into the _______of the ER

Answer 16

Lumen

Question 17

_______ is a type of endoplasmic reticulum that DOES NOT HAVE RIBOSOMES and is concerned with the synthesis of LIPIDS

Answer 17

Smooth endoplasmic reticulum. Also deals with CARBOHYDRATE METABOLISM AND DETOXIFICATION

Question 18

__________ is a cell organelle which consists of a number of flattened membrane-bound sacs in which proteins are modified.

Answer 18

Golgi Apparatus.

Question 19

________ are organelles that are formed by the golgi apparatus and contain digestive enzymes that break down cellular waste and debris.

Answer 19

Lysosomes

Question 20

Lysosoms are surrounded by _____ membrane/s
A)1
B)2
C)3
D)0

Answer 20

A)1
They are surrounded by a single membrane and have NO SPECIALISED INTERNAL STRUCTURE🛖

Question 21

True or False.
The cell wall of plants is freely permeable

Answer 21

True. Due to the large gaps

Question 22

_______ in a plant cell is a fluid filled sac that stores a range of solutes.

Answer 22

Vacuole. It is also important in maintaining turgidity.