2018

Question 1

main structural polysaccharide in plant

Answer 1

cellulose

Question 2

structural role of lipids

Answer 2

found in membrane
insulation

Question 3

community

Answer 3

all the organisms in an area

Question 4

population

Answer 4

all the organisms of a particular species living in an area

Question 5

niche

Answer 5

the role of an organism in its ecosystem

Question 6

qualitative survey

Answer 6

to establish the presence or absence of a species

Question 7

cancer

Answer 7

a group of disorders due to uncontrolled rate of mitosis

Question 8

genetic engineering

Answer 8

manipulation of genes

Question 9

isolation
(genetic engineering)

Answer 9

removal of a gene (or piece of dna or of a plasmid)

Question 10

expression
(genetic engineering)

Answer 10

the gene causes the production of protein (or product)

Question 11

rings of dna used as cloning vectors

Answer 11

plasmids

Question 12

applications of genetic engineering

Answer 12

animals : clotting factors, lactose free milk, growth hormone
plants : resistance to herbicide, slow ripening, longer shelf life
microorganisms : production of interferon, oil breakdown

Question 13

why should paper be left to dry out in fat test

Answer 13

to ensure translucent stain isn’t just water

Question 14

where does dark stage take place in cell

Answer 14

chloroplast

Question 15

why is elodea used in experiment of photosynthesis

Answer 15

aquatic plant produced bubbles

Question 16

how rhizopus differs from yeast

Answer 16

•multicellular
•has hyphae
•produces zygospores

Question 17

aseptic techniques

Answer 17

•minimal opening of containers
•wash bench with disinfectant
•sterilizing instruments
•wash hands

Question 18

type of agar for fungi

Answer 18

malt agar

Question 19

how to identify leaf yeast on agar

Answer 19

pink colonies

Question 20

why few/no leaf yeasts on agar

Answer 20

•air pollution
•time of year
•recent rainfall
•unsuitable temperature

Question 21

why pyramids of numbers usually constructed to three or four levels

Answer 21

due to large energy loss at each level

Question 22

conservation

Answer 22

management of the environment to maintain biodiversity and prevent extinction

Question 23

where does carbon dioxide enter the blood

Answer 23

the cells

Question 24

precise location of sa node

Answer 24

right atrium

Question 25

role of sa node

Answer 25

•generates and sends electrical impulses

Question 26

precise location of the av node

Answer 26

in the septum between the right atrium and right ventricle

Question 27

role of av node

Answer 27

•causes contraction in the ventricles and controls heart rate

Question 28

what’s measured when a persons blood pressure is taken

Answer 28

•force of blood against the wall of the artery •force required to stop flow of blood in the artery

Question 29

adv of cell using atp as energy source

Answer 29

•atp released energy in sustainable quantities •energy is available for immediate use •energy is recycled

Question 30

nitrogenous base in atp

Answer 30

adenine

Question 31

sugar in atp

Answer 31

ribose

Question 32

human storage polysaccharide

Answer 32

glycogen

Question 33

a major storage location of glycogen

Answer 33

•liver •muscle

Question 34

fate of atp in krebs cycle

Answer 34

breaks down and released energy

Question 35

fate of nadh in krebs cycle

Answer 35

breaks down and releases electrons

Question 36

substances to immobilise enzymes

Answer 36

•sodium alginate •calcium chloride

Question 37

advs of immobilized enzymes

Answer 37

•reusable •recovered easily •pure product

Question 38

biologically active entities that only contain one type of nucleic acid

Answer 38

viruses

Question 39

locations in eukaryotic cells where rna but no dna is found

Answer 39

cytosol ribosome

Question 40

evolution

Answer 40

inheritable change within a population in response to change of environment or over time

Question 41

theory of evolution by natural selection

Answer 41

organisms that are more adapted to their environment are more likely to survive and of in the genes that aided their success

Question 42

binary fission

Answer 42

•dna replicates •cell elongates •dna move to opposite sides •in growth of membrane •cell splits in two

Question 43

batch processing

Answer 43

growth in a closed system with a specific amount of nutrient medium defined amts if nutrient material and living matter are placed in a bioreactor and removed when the process is complete

Question 44

how certain bacteria respond to unfavorable conditions

Answer 44

they form an endospore

Question 45

bile contains bile salts

Answer 45

they emulsify fats provide optimum ph for enzymes in the duodenum

Question 46

active immunity lasts

Answer 46

antibodies are produced

Question 47

humans sweat during exercise

Answer 47

body temperature increases and sweat evaporates using heat from body