bio

Question 1

what does the nucleus do

Answer 1

controls the cells activity

Question 2

what does the cell membrane do

Answer 2

controls what comes in and out of the cell

Question 3

what does the cytoplasm do

Answer 3

a substance which chemical reactions take place

Question 4

what does the cell wall do

Answer 4

supports the cell

Question 5

what does the vacuole do

Answer 5

stores water and chemicals, supports the cell

Question 6

what does the chloroplast do

Answer 6

required for photosynthesis

Question 7

what is yeast

Answer 7

yeast is a single celled fungus

Question 8

what can we use yeast for

Answer 8

for brewing ad baking

Question 9

what 3 structures do a animal cell have

Answer 9

cell membrane
nucleus
cytoplasm

Question 10

what 3 structures do a plant cell have but an animal cell doesn’t

Answer 10

chloroplast
cell wall
vacuole

Question 11

what is an antibiotic

Answer 11

an antibiotic is a chemical that stops the growth of a microorganism

Question 12

what can you make using yeast

Answer 12

bread

beer/alcohol

Question 13

what are cells

Answer 13

building blocks of life

Question 14

how do you make yogurt

Answer 14

you add bacterix go milk

Question 15

3 reasons why the milk is heated up in the yogurt making process

Answer 15

to remove air
to change the milks proteins
to kill bacteria

Question 16

what is the difference between biological and non-biological detergents

Answer 16

biological detergents contain enzymes and non-biological don’t

Question 17

what are the advantages and disadvantages or biological detergents.

Answer 17

advantages disadvantages

.clean better. .allergic reactions
.low temperature .high cost of product
.save energy and money. .enzymes may digest natural fibres such e. as wool and silk

Question 18

what is an antibiotic

Answer 18

an antibiotic is a chemical that prevents the growth of an micr organism

Question 19

what are antibiotics used for

Answer 19

to fight bacterial infections.

each antibiotic is affective against different types of bacteria

Question 20

who discovered penicillin.

Answer 20

Alexander Fleming

Question 21

what is penicillin

Answer 21

penicillin is a natural chemical produced by fungus which is toxic to some bacteria but not toxic to humans

Question 22

bacteria which are sensitive to an antibiotic are

Answer 22

killed by the presence of that antibiotic and will show no growth near that antibiotic.

Question 23

bacteria which are resistant to an antibiotic are

Answer 23

not affected by the presence of that antibiotic and will still grow near that antibiotic.

Question 24

how to anti-fungus creams work

Answer 24

They work by killing fungal cells and preventing further growth.

Question 25

how does anti bacterial cleaners work

Answer 25

They remove dirt and kill bacteria. | They can also prevent bacteria from growing on the surface for some time after use.

Question 26

how are new cells produced and what is the process called

Answer 26

by cell devision mitosis Mitosis is when the cell divides to form 2 identical daughter cells.

Question 27

what are chromosomes

Answer 27

Chromosomes in the nucleus carry the genetic information of a cell.

Question 28

Mitosis makes new cells for

Answer 28

growth and repare

Question 29

bacteria need good conditions to grow. what are these conditions

Answer 29

temperature pH source of nutrients/energy

Question 30

what is the function of DNA

Answer 30

to pass on inherited characteristics from parents to offspring

Question 31

where is the DNA information stored and how many of them are there

Answer 31

chromosomes | 46

Question 32

what are chromosomes made up of

Answer 32

genes which give you particular characteristics Chromosomes are made of tightly coiled DNA.

Question 33

what does DNA give instructions to

Answer 33

proteins | Proteins are used for cell parts, enzymes, hormones, antibodies, etc.

Question 34

what is DNA profiling

Answer 34

DNA profiling is a technique used by forensic scientists to assist in the identification of individuals using their DNA.

Question 35

what can DNA profiling be used for

Answer 35

* in forensics (to identify criminals) * in paternity testing (test to find out the father of a child) * in archaeology * to assess future health risks

Question 36

what can you got DNA cells from

Answer 36

``` skin cells blood hair root saliva Seminal Fluid ```

Question 37

do identical twins have the same DNA

Answer 37

yes

Question 38

what is forensics advantages disadvantages

Answer 38

identifying a dead body or DNA samples found at a crime scene. Can identify a dead body.Can identify suspects at a crime scene. Can reduce wrongful convictions. On it’s own it’s inconclusive – DNA evidence could be planted at a crime scene or been there prior to criminal activity. Samples are easily contaminated.

Question 39

what is Paternity testing advantages disadvantages

Answer 39

identifying the biological father. Identify the biological father. Can be used in child support cases. Expensive. Identify the biological father (could cause problems).

Question 40

what is Archaeology advantages disadvantages

Answer 40

identifying human remains. Could identify the ethnicity of the individual. Could identify if remains found together were related. Difficult to get a suitable sample, i.e. tissue/cells to analyse.

Question 41

what is Assessing future health risks advantages disadvantages

Answer 41

identifying potential for developing different genetically inherited illnesses. Able to alter lifestyle accordingly. Seek correct medical treatment sooner. Understand impact on potential offspring. Information could be shared – violation of privacy. Information could be used by companies to deny a product e.g. bank loan, health insurance.

Question 42

what is Photosynthesis

Answer 42

Photosynthesis is the process by which green plants make high energy foods (sugar and starch).

Question 43

photosynthesis equation

Answer 43

light carbon dioxide + water ————oxygen + sugar chlorophyll

Question 44

what are the limiting factors for photosynthesis

Answer 44

Light intensity Carbon dioxide concentration Temperature If the light intensity or the carbon dioxide concentration increases, the rate of photosynthesis also increases and the opposite is true is these conditions decrease. If any of these factors are limiting, the rate of photosynthesis slows down.