Biology

Question 1

Adaptation

Answer 1

Characteristic they make organism/cells best suited for their environment/function

Question 2

Differentiation

Answer 2

Process during an unspecialised cell turns into very specific cell with a specific adaptation

Question 3

7 parts of an microscope

Answer 3

1.Eye piece lens
2.fine focusing wheel (small)
3.course focusing wheel (big)
4. Objective lens
5.Slide
6.Stage
7.Mirror

Question 4

Magnification

Answer 4

the process of enlarging the physical appearance/image of something

Question 5

image size=

Answer 5

actual size * magnification

Question 6

advantages and disadvantages of electron microscopes

Answer 6

-Vacuum required
-Sample must be dead
-No colours
-High resolution
-Expensive to buy and operate
-Complex sample preparations

Question 7

advantages and disadvantages of light microscopes

Answer 7

-Vacuum isn’t required
-Sample mustn’t be dead
-Colours
-Low resolution
-Not that expensive
-Complex sample preparations

Question 8

resolution

Answer 8

ability to distinguish between two points

Question 9

Parts of animal cells

Answer 9

Ribosome
Cell membrane
Nucleus
Mitochondria
Cytoplasm

Question 10

Parts of plant cells

Answer 10

(everything from animal cells)
Large permanent Vacuole
Chloroplast
Cell wall

Question 11

Parts of bacteria cell

Answer 11

Cell membrane
Cell wall
Slime coat
Ribosomes
Plasmid
Single loop of DNA
Flagellum

Question 12

Enzyme

Answer 12

Enzymes act as a biological catalysts by lowering activating energy for a reaction to occur and not being changed chemically in the reaction

Question 13

Process when substate is going in activate site

Answer 13

Enzyme substare complex

Question 14

Enzymes activate site is…

Answer 14

complimentary to substare

Question 15

Salivary Amylase
Trypsin
Maltase
Lipase
Protease

Answer 15

Carbohydrate to glucose
Chains of amino acids to smaller chains of amino acids
Maltose to glucose
Lipids to fatty acids + glycerol
proteins to amino acids

Question 16

Molecule(reagent):
Scratch
Protein
Fat (lipids)
Glucose

Answer 16

Reagent and other conditions:
iodine
biuret 1 and 2, shake
Water, ethanol
Benedict after 5 min in water bath (>80C)

Question 17

Molecule(Colour change):
Scratch
Protein
Fat (lipids)
Glucose

Answer 17

Colour change:
from orange to blue/black
From blue to purple
From transparent to milky white
From blue to (yellow, green, orange) brick red

Question 18

Metabolism

Answer 18

All reactions in the body that break substances down and all those reactions that build new substances

Question 19

Energy in food(Joule)=

Answer 19

Mass of water * Temperature change of water * 4.2

Question 20

Energy per gram of food

Answer 20

energy in food(J)/mass of food(g)

Question 21

Factors that affect rate of reaction of enzymes

Answer 21

Temperature
Activity
Substate concentration

Question 22

Denaturation

Answer 22

Change of proteins active side because of unfolding of it.

Question 23

Rate of diffusion affected by:

Answer 23

temperature
concentration grqadient

Question 24

percentage change in mass =

Answer 24

(final mass-initial mass)/initial mass*100

Question 25

Add on specialised cells and transport

Question 26

most of enzymes are produced in

Answer 26

small intestine

Question 27

Millimetre in micrometres(μm)

Answer 27

1000 mm

Question 28

…Hardens after fusion with a sperm to don’t let other sperm come

Answer 28

Sperm

Question 29

Facts about egg cell