2023

Question 1

the three chemical elements present in all carbohydrates

Answer 1

carbon, hydrogen, oxygen

Question 2

general formula for carbohydrates

Answer 2

Cx(H2O)y

Question 3

one structural role of carbohydrates in living organisms

Answer 3

creates cell wall

Question 4

where might a scientist publish their results

Answer 4

a scientific journal

Question 5

limitations of the scientific method

Answer 5

•extent of knowledge
•basis of investigation
•human error
•experimental design
•ability to interpret results
•accidental discovery
•application to nature

Question 6

functions of the skeleton

Answer 6

•protection
•movement
•support
•blood cell production

Question 7

the bio molecule that is the main component of cartilage

Answer 7

protein

Question 8

what are the innominate bones more commonly known as

Answer 8

the pelvis OR hip bones

Question 9

what does DNA stand for

Answer 9

deoxyribonucleic acid

Question 10

name the base present in RNA that isn’t in DNA

Answer 10

uracil OR u

Question 11

the term describing how bacteria reproduce asexually

Answer 11

binary fission

Question 12

explanation for “food chains are limited in length”

Answer 12

a large amount of energy is lost as it passes to each trophic level, and it eventually becomes not enough

Question 13

explain “there is always competition between members of a species”

Answer 13

members of a species need the same resources so there is always competition

Question 14

explain “fruit formation by plantsl

Answer 14

to protect seeds

Question 15

explain “urine volume will be low if a person doesn’t regularly drink fluids”

Answer 15

more water is reabsorbed

Question 16

explain “doctors don’t prescribe antibiotics for viral infections”

Answer 16

antibiotics only kill bacteria or fungi

Question 17

explain “meiosis halves the number of chromosomes in cells”

Answer 17

they do this to produce gametes for sexual reproduction

Question 18

explain “the septum separate the two sides of the human heart”

Answer 18

it does this to prevent oxygenated blood and deoxygenated blood from mixing

Question 19

what is the name of the process of water splitting in stage 1 of photosynthesis using energy in light

Answer 19

photolysis

Question 20

how is nadph produced

Answer 20

added or picked up electrons
added or picked up proton

Question 21

atp

Answer 21

adenosine triphosphate

Question 22

the parts of the earth where life can exist

Answer 22

biosphere

Question 23

living factors that have an effect in an ecosystem

Answer 23

biotic

Question 24

what is meant by anaerobic

Answer 24

oxygen is absent

Question 25

what other substance is produced in animal cells as a result of anaerobic respiration

Answer 25

lactic acid

Question 26

asepsis

Answer 26

free from pathogens

Question 27

sterility

Answer 27

free from micro organisms

Question 28

stage 1 in aerobic respiration

Answer 28

glycolysis

Question 29

what happened to electrons when they’re removed in krebs cycle

Answer 29

pass to NAD+ to make NADH then pass to electron transport chain and make water

Question 30

ADP + P + Energy ——->

Answer 30

ATP + H2O

Question 31

active site theory of enzyme action

Answer 31

•enzyme complementary shape to substrate •enzyme substrate complex formed •product formed •enzyme returns to original shape & can be reused

Question 32

catabolic enzyme

Answer 32

amylase

Question 33

anabolic enzyme

Answer 33

polymerase

Question 34

harmful viruses

Answer 34

•common cold •HIV •corona virus

Question 35

his can viruses benefit humans

Answer 35

•can be used as a vector in genetic engineering •potentially used to test bacterial infection •vaccine production

Question 36

a way to distinguish between edible and poisonous mushrooms

Answer 36

using a key

Question 37

stolon function

Answer 37

•spread out/reproduction a hypha that can move over the surface of the bread to help the fungus spread quicker

Question 38

rhizoid

Answer 38

•absorption of nutrients special hyphae that grow deep into the bread to absorb food

Question 39

sporangium function

Answer 39

produce (release) spores

Question 40

vein that carrie’s blood richest in oxygen

Answer 40

pulmonary vein

Question 41

vein that carries blood between intestine and liver

Answer 41

hepatic portal vein

Question 42

vein that carries blood lowest in metabolic wastes

Answer 42

renal vein

Question 43

vein that carries blood into right atrium of heart

Answer 43

vena cava

Question 44

nutrient recycling

Answer 44

exchange of elements between organisms and their enviornment