Movement Of Substances In And Out Of Cells And Nutrition

Question 1

Photosynthesis chemical equation

Answer 1

6CO2 + 6H2O —> C6H12O6 + 6O2

Question 2

Photosynthesis

Answer 2

The chemical process in which plants absorb light and carbon dioxide and create glucose and oxygen.

Question 3

Uses for photosynthesis

Answer 3

Converts light energy into useable chemical energy
Produces oxygen
Removes carbon dioxide from the air
Produces food (glucose) which is the basis of every food chain

Question 4

What effects photosynthesis?

Answer 4

If a plant gets more light, carbon dioxide or water or a higher temperature, then it might be able to photosynthesize at a faster rate.
However, the rate of photosynthesis will eventually reach a maximum because there is not enough of one of the factors needed, one of them becomes a limiting factor.

Question 5

Photosynthesis adaptations

Answer 5

Leaves are broad so as much light can be absorbed.
Leaves are thin so CO2 can diffuse in to reach the cells easily.
Leaves contain chlorophyll in chloroplasts which absorbs light energy.
Leaves have veins to transport water.
Leaves have stalks to hold up the leaf to the light.

Question 6

Needs of plants

Answer 6

Nitrates: Used to make amino acids and protein
Magnesium: Part of chlorophyll molecule
Phosphate: Making DNA
Potassium: Needed for enzymes of respiration

Question 7

Diffusion

Answer 7

The movement was of gas or resolved molecules from higher to lower concentration.
Does not require any energy.

Question 8

Equilibrium

Answer 8

Equal amounts on both sides

Question 9

Osmosis

Answer 9

Diffusion is water molecules.
The movement of water molecules from a region of high water concentration to a region of low concentration across a semipermeable membrane.

Question 10

Hypertonic

Answer 10

Strong salt solution
Less water outside
Cell gets smaller - becomes flaccid
Water leaves the cell

Question 11

Hypotonic

Answer 11

Distilled water
Lower salt concentration
The cell is turgid
Water enters the cell

Question 12

Isotonic

Answer 12

Plasmolyzed
No movement of water into or out of cell
Gaps appear between cell wall and membrane

Question 13

Active transport

Answer 13

The movement of molecules across a cell membrane from a region of low concentration to a region of high concentration.

Question 14

How is Active transport used to uptake glucose in the small intestine

Answer 14

Active transport takes place in the small intestine. Carbohydrates are broken down into simple sugars. Glucose is absorbed by the active transport into the villi, where it will be passed into the bloodstream and taken around the body.

Question 15

How does active transport is used to uptake minerals/water in the roots of plants?

Answer 15

On the surface of root hair cells, there are carrier molecules which pick up the minerals and move them into the cell against the concentration gradient.

Question 16

Factors that effect diffusion

Answer 16

Temperature of the environment, the solvent density,

And the distance travelled

Question 17

Factors that effect osmosis

Answer 17

Light and dark - faster in light than dark
Surface area (the more there is the less restricted the particles are)
Pressure (the more pressure the faster they go)

Question 18

Factors that effect active transport

Answer 18

Oxygen concentration,
Temperature,
pH