Revision

Question 1

Name the 3 stages in cellular respiration and where they occur

Answer 1

Glycolosis - Cytoplasm
Krebs Cycle - Mitochondria
ETC (Electron Transport Chain) - Inner Mitochondrial Wall

Question 2

When dose photosynthesis and respiration occur

Answer 2

Photosynthesis - day

Respiration - day and night

Question 3

What is herd immunity and why is it important

Answer 3

Herd immunity is when a significant amount of the population is protected through vaccination against a virus or disease.
It is important because it can help protect members of the community that cannot be vaccinated for a number of reasons. Herd immunity can essentialy stop the spread of a disease within a community

Question 4

What are the two stages of photosynthesis

Answer 4

Light Reactions

Dark Reactions

Question 5

What part of the brain is responsible for higher order thinking

Answer 5

Prefrontal Cortex

Question 6

What is an example of acquired passive immunity

Answer 6

Vaccination for measles given as a ;art of a school based program

Question 7

What part of the brain is responsible for homeostasis

Answer 7

Hypothalamus

Question 8

What part of the brain is responsible for involuntary responses

Answer 8

Brain Stem

Question 9

Describe the struct of ATP

Answer 9

ATP – Adenosine Triphosphate
5 Carbon sugar (ribose)
Nitrogenous Base (Adenine)
3 Phosphate Groups
The chemical bond that link the phosphate groups together are high energy bonds.
When a phosphate group is removed to from ADP (Adenosine Diphosphate) and P, small pockets of energy are released.

Question 10

Why is most life found within a narrow temperature range

Answer 10

Enzymes only function in a certain temperature zone

Question 11

What is hypertonic

Answer 11

Hypertonic – the internal water concentration is higher than the cell cytoplasm.

Question 12

What is hypotonic

Answer 12

Hypotonic – the internal water concentration is lower than the cell cytoplasm.

Question 13

What is isotonic

Answer 13

Isotonic – internal and external water of the cell are the same

Question 14

List features of a prokaryotic cell

Answer 14

First type on earth
Cell type of bacteria and archaea
No membrane bound nucleus
Nucleoid – region of DNA concentration

Question 15

List features of a eukaryotic cell

Answer 15

Nucleus bound membrane
Includes fungi, protists, pants and animal cells
Passes many organelles

Question 16

List features of an enzyme

Answer 16

End in -ase
Are reusable
Are specific for what they catalyse
Enzymes work by weakening bonds which lowers activation energ

Question 17

State the process by which water crosses the cell membrane.

Answer 17

Osmosis

Question 18

Explain how the concentration gradient influences the rate of diffusion.

Answer 18

The higher the concentration the faster the rate of diffusion