Paper 1 biology

Question 1

Difference between Prokaryotic and Eukaryotic cells

Answer 1

Pro- DNA in plasmids
Eu- DNA in nucleus

Question 2

Adaptations of nerve cell (2)

Answer 2

Long axon impulse to one another using chemicals, lots of dendrites

Question 3

2 aspects of sieve plates

Answer 3

allow food and water to pass
kept alive by companion cells

Question 4

What are xylem walls made for and why is it good

Answer 4

Lignin, strong

Question 5

Copy cells for? (3)

Answer 5

Growth, repair, reproduction

Question 6

1.What happens in replication? (1)

Answer 6

organelles and chromosomes copied

Question 7

2. What happens in mitosis?(2)

Answer 7

Contents rearranged, chromosomes pulled to each end.

Question 8

What does the embryo have in therapeutic cloning?

Answer 8

same genes as patient

Question 9

What is a hypertonic solution

Answer 9

solution with higher concentration of solutes than cell

Question 10

What is the name for plant cells when they receive too much water so the plant wilts?

Answer 10

flaccid

Question 11

2 adaptations of root hair cell

Answer 11

large SA, mitochondria for active transport

Question 12

where does energy for active transport come from?

Answer 12

respiration in mitochondria

Question 13

Muscular tissue for?

Answer 13

movement

Question 14

Epithelial tissue for?

Answer 14

protection

Question 15

Glandular tissue for?

Answer 15

secreting enzymes

Question 16

2 things diffusion is for in animals?

Answer 16

gas exchange in cells
removal of urea

Question 17

high surface area to volume ratio=?

Answer 17

increased diffusion

Question 18

What are starch, proteins and lipids needed for?

Answer 18

Starch- energy
Proteins- growth/repair
Lipids- energy and insulation

Question 19

How is the oesophagus adapted?

Answer 19

stretchy and muscular

Question 20

2 things stomach has?

Answer 20

acid- kills bacteria
mucus- protects lining

Question 21

what does the large intestine have?

Answer 21

millions of bacteria break down undigested food

Question 22

Test for glucose?

Answer 22

benedict’s with heat

Question 23

What can change one molecule into another?

Answer 23

Enzymes

Question 24

Where is amylase, protease and lipase found?

Answer 24

Amylase- Salivary glands, pancreas and small intestine
Protease- Stomach, pancreas and small intestine
Lipase- Pancreas and small intestine

Question 25

What state is plasmid

Answer 25

liquid

Question 26

shape of RBCs?

Answer 26

biconcave

Question 27

3 features of veins

Answer 27

thin walls
large lumen
valves

Question 28

3 features of arteries

Answer 28

thick walls
thick muscular tissue
small lumen

Question 29

what do capillaries do?

Answer 29

allow diffusion of substances from blood to cells or back

Question 30

double circulatory features?

Answer 30

deoxygenated and oxygenated

Question 31

what do statins help do?

Answer 31

reduce cholesterol

Question 32

why can a bypass help

Answer 32

extra capacity to deliver oxygen

Question 33

translocation

Answer 33

movement of sugar in plants

Question 34

transpiration

Answer 34

loss of water through stomata