Cells And Microscopes

Question 1

how do electron microscopes work?

Answer 1

They pass a beam of electrons through a sample and then by detecting how many electrons passed through they buildup an image

Question 2

Magnification equations

Answer 2

Magnification of eyepiece x magnification of objective or image size over actual size

Question 3

What is the best unit to measure most cells in?

Answer 3

Micrometer,ųm

Question 4

How do you find a millimetre using metres?

Answer 4

Times by 1000

Question 5

How do you find a micrometre using a millimetre?

Answer 5

Divided by 1000

Question 6

How do you find an nanometre using a micrometre?

Answer 6

Divide by 1000

Question 7

What is the small square or circle that is placed over the specimen called?

Answer 7

A coverslip

Question 8

What is the object you can only see ribosomes with?

Answer 8

Electron microscopes

Question 9

What is the cytoplasm?

Answer 9

A jelly like material that contains dissolved nutrients and salts and structures called organelles

Question 10

What happens in the cytoplasm?

Answer 10

Chemical Reactions

Question 11

What is the cell membrane like to some substances

Answer 11

Semi-permeable

Question 12

What is the function of the cell membrane?

Answer 12

Controls the movement of substances in and out the cell

Question 13

What is the mitochondria?

Answer 13

Organelles that contain enzymes for respiration

Question 14

What are ribosomes?

Answer 14

Tiny Structures

Question 15

What occurs in ribosomes?

Answer 15

Protein synthesis

Question 16

What are chloroplasts?

Answer 16

Organelles containing a green pigment, chlorophyll

Question 17

What do chloroplast do?

Answer 17

Absorb light energy for photosynthesis

Question 18

What is the cell wall made from?

Answer 18

Cellulose fibres

Question 19

What does the cell Wall do?

Answer 19

Strengthen the cell and supports the plant

Question 20

What is the permanent vacuole filled with and what is its function?

Answer 20

It is filled with cell sap and it keeps the it turgid

Question 21

What type of cells are bacteria?

Answer 21

Prokaryotic cells

Question 22

What type of cells are animal plants and fungi cells?

Answer 22

Eukaryotic cells

Question 23

What cells are bigger, eukaryotic or prokaryotic?

Answer 23

Eukaryotic

Question 24

What are the contents of eukaryotic cells?

Answer 24

Cytoplasm, mitochondria, chloroplast, and ribosomes

Question 25

What are the contents of prokaryotic cells?

Answer 25

Cytoplasm and ribosomes

Question 26

Where is DNA found in eukaryotic cells?

Answer 26

In the nucleus

Question 27

Where is DNA found in prokaryotic cells?

Answer 27

Single molecule found in the cytoplasm or on plasmid rings

Question 28

What is the type of cell division in eukaryotic cells?

Answer 28

Mitosis

Question 29

What type of cell division happens in prokaryotic cells?

Answer 29

Binary fission

Question 30

What are the adaptations of a sperm cell?

Answer 30

The head of sperm contains genetic material for fertilisation acrosome in the head contains enzymes for the sperm to penetrate an egg packed of mitochondria for energy tail allows the sperm to swim

Question 31

What are the adaptations of nerve cells?

Answer 31

It is extended to run from different different parts of the body to the central nervous system has extensions and strand communicate with nerve cells muscles and glands covered in a fatty sheath forinsulation to speed up the nerve impulse

Question 32

What are the adaptations for muscle cells?

Answer 32

Contains filaments of proteins that slide over each other to cause muscle contraction contain well developed mitochondria to provide energy for muscle contraction

Question 33

What are the adaptations of a root hair cell ?

Answer 33

Hairs provides contact with soil water thin walls to not restrict movement of water, large surface area

Question 34

What the adaptation of Xylem cells?

Answer 34

No top or bottom walls were continuous column water running through them walls become thickened through lignin to support the plant

Question 35

What are The adaptation of phloem cells?

Answer 35

Dissolve sugars plus amino acids transported up and down the stem companion cell adjacent to the sieve tubes provide energy to transport substances in the phloem

Question 36

What are The adaptation of phloem cells?

Answer 36

amino acids transported up and down the stem companion cell adjacent to the sieve tubes provide energy to transport substances in the phloem