Cells(B)(p1/2)

Question 1

What subcellular structures are in an animal cell ? And their functions?(5)

Answer 1

-cell membrane: control what goes in a substance
-nucleas: contains genetic material
-cytoplasm : where chemical reactions take place
-mitochondria: provide cell with energy via aerobic respiration
-ribosomes: contains protein synthesis

Question 2

What subcellular structures are in a SPECIFICly in a plant cell!!!!(3)

Answer 2

Rigid cell wall: support the structure
Permanent vacuole: contain cell sap
Chloroplast: where photosynthesis takes place

Question 3

What are the subcellular structures of a bacteria cells((7!))

Answer 3

Cell wall
Cytoplasm
Cell membrane
Ribosome
Circular strand of DNA (genes that allow reproduction)
Plasmid(extra genes)
Flagella(propel bacteria)

Question 4

Are bacteria cells prokaryotic or eukaryotic?

Answer 4

Prokaryotic

Question 5

What is a catalyst?

Answer 5

A substance that increases the speed of a reaction. Without being changed or used up in the process.

Question 6

What are enzymes?

Answer 6

‘Biological enzymes’

• there are large protiens. Made up of long chains of amino acids

Question 7

How do enzymes work?

Answer 7

They speed up reactions via the active site, which is complementary to the substrate. If it doesn’t fit ln , then reaction won’t be catalysed.

Which make them very specific which reactions they speed up

Question 8

What is the lock and key model?

Answer 8

Lock and key: Substrate fit perfectly into active site

I

Question 9

What is the induced fit?

Answer 9

Enzyme actually changes shape to binding substrate too fit in active site‘complimentary’

Question 10

What are the parts of a light microscope (10!!)

Answer 10

-arm
-Base
-light source(mirror)
-stage
-microscope slide
-Objective lense (different magnification)
-coarse focusing knob
-Fine Focusing Knob
-Body Tube
-Eyepiece lens(fixed magnification)

Question 11

What is the object?

Answer 11

The real sample that your looking at(onion cells)

Question 12

What is the image?

Answer 12

The image we see when we look down the microscope

Question 13

How do light microscopes work?

Answer 13

Light reflects onto mirror,
-then up through the object
-then passed through objective lens and eyepiece lens to our eyes
(Process spreads out light rays for image to be seen larger)

Question 14

What is magnification and resolution?

Answer 14

MagnificTion: How many times larger the Image is than the Object.

Resolution: Shortest distance between two points on an object, that can still be distinguished as two separate entities(how detail Image is)

Question 15

What is the differences between a light microscope and an electron microscope?

Answer 15

Light:
-cheap
-easy to use
-lower resolution
Electron:
-expensive
-hard to use
-higher resolution
-can study sub cellular structures