Cells

Question 1

What are all living things made off?

Answer 1

cells, prokaryotic or eurkaryotic

Question 2

what are eukaryotic, and what is found?​

Answer 2

Animal and plant cells. Contains cell membrane, cytoplasm, and nucleus.​

Question 3

What are prokaryotic, and what is found?​

Answer 3

Bacterial cells. Contains cell wall, membrane, cytoplasm, single circular strand of DNA, and plasmids.​

Question 4

What is nucleus?​

Answer 4

Contains DNA for protein needed to build new cells. Enclosed in nuclear membrane.​

Question 5

What is cytoplasm?​

Answer 5

Liquid substance, chemical reactions occur.​

Question 6

What is cell membrane?​

Answer 6

Controls what comes inside and out of cell.​

Question 7

What is mitochondria?​

Answer 7

Aerobic respiration reactions occur, providing respiration energy for all cells.​

Question 8

What is ribosomes?​

Answer 8

Where protein synthesis occurs.​

Question 9

What is chloroplasts?​

Answer 9

Photosynthesis takes place, contains chlorophyll pigment making it green,​

Question 10

What is permanent vacuole?​

Answer 10

Cell sap, within cytoplasm, improving rigidity.​

Question 11

What is cell wall?​

Answer 11

Made from cellulose, providing strength to cell.​

Question 12

what is egg cell?

Answer 12

Accept single sperm, and develop into embryo.​

Question 13

what is sperm cell?

Answer 13

Carry males DNA to egg cell, for reproduction​

Question 14

What is cilated epithelial cell?​

Answer 14

Waft bacteria to stomach​

Question 15

How is egg cell specialised?​

Answer 15

Surrounded by special cell membrane, only accepting 1, and becomes imperable after, lots of mitochondria to provide energy source for developing embryo, and large size, and cytoplasm allows quick repeated division.

Question 16

How is sperm cell specialised?​

Answer 16

Streamlined head, long tail to swim, mitochondria to supply energy to move, acrosome having digestive enzymes to break eggs cell, haploid, only having 23.

Question 17

How is ciliated epitheilial specialised?​

Answer 17

Long hair called cilia waft mucus down to stomach, killed by acid. ​

Question 18

What is light microscope?​

Answer 18

2 lenses, illuminated from underneath. View tissues, and large sub cellular structures.​

Question 19

What is electron microscope?​

Answer 19

High magnification, and low resolving power. Electrons used to form image, as have small wavelength then of light waves.

Question 20

What are differences between light and electron microscopes?​

Answer 20

Electron allow to view many organelles clearly, like ribosomes, discover viruses, examine proteins.​

Question 21

How is a microscope slide prepared?​

Answer 21

Peel off epidermal, using forceps, place sample on drop of water, add drops of iodine, cover slip using mounting needle.​

Question 22

Why is thin sample of tissue required?​

Answer 22

Allows water to pass, internal pictures can be observed.​

Question 23

Why is water added?​

Answer 23

Allows sample to be suspended between slide, and cover slip, ensures stays in place.​

Question 24

Why is water added?​

Answer 24

Allows sample to be suspended between slide, and cover slip, ensures stays in place.​

Question 25

Why is iodine solution added?​

Answer 25

Adds contrast, reacts with starch, turns black, internal pictures=visibility.​

Question 26

What is formula for magnification?​

Answer 26

Observed cell length/actual cell length.​