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Biol Resit > May 2013 > Flashcards

May 2013 Flashcards

0
Q

Why is it necessary for large food molecules to be broken down?

A

So it can be absorbed into the bloodstream

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1
Q

Large food molecules
PROTEIN
STARCH
FATS

Broken down to..

Smaller molecules
GLUCOSE
FATTY ACIDS AND GLYCEROL
AMINO ACIDS

And what are their enzymes?

A

PROTEIN(protease) -> AMINO ACIDS
STARCH(carbohydrase)->GLUCOSE
FATS(lipase)->GLYCEROL AND FATTY —ACIDS

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2
Q

State the function carbohydrate foods in the human body

A

It releases energy slowly

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3
Q

What is under the stomach?

A

Pancreas

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4
Q

Where is the gall bladder?

A

In / by the liver

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5
Q

Name two places where is protein digested

A

The LIVER

The SMALL INTESTINE

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6
Q

Test solutions for:
Glucose ->
<- Biuret

A

Glucose -> Benedict

Protein <- Biuret

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7
Q

Why after being boiled there is no enzyme activity in a control tube?

A

Because the enzyme was boiled and denatured.

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8
Q

On which substance in milk does lipase act?

A

Fat

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9
Q

In an algal cell (looks like a fruit cut in half) where is:

The cell wall
Cell membrane
Cytoplasm
Nucleus
Large chloroplast
A 
The cell wall-> around the cell
Cell membrane-> inside cell wall
Cytoplasm -> empty back of cell
Nucleus -> small ball
Large chloroplast -> big pool
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10
Q 
What out of these:
The cell wall
Cell membrane
Large chloroplast
Cytoplasm
Nucleus

Is not present in an animal cell

A

Large chloroplast

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11
Q

Name on part of algal cell which is not present in bacteria cell

A

Nucleus

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12
Q

DNA is made up of two long chains of alternating ______ and ______ molecules which are joined by the ______ A,T,C and G. DNA is twisted to form a double ______.

A

DNA is made up of two long chains of alternating SUGAR and PHOSPHATE molecules which are joined by the BASES A,T,C and G. DNA is twisted to form a double HELIX.

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13
Q

Why is the order A,T, C and G in DNA is important in the production of proteins?

A

A pairs with T and C pairs with G, the order forms a code for the correct proteins.

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14
Q

Suggest why some people support embryonic stem cell research, whereas others do not?

A

Scientists hope to use stem cells to TREAT ILLNESSES such as PARKINSON’S and DIABETES to correct damage to issues such as slin cord.

But the embryo must be killed jn the process.

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15
Q

What type of cells are injected in to hip joints of someone with arthritis?

A

Embryonic stem cells

16
Q

State one advantage over the use of embryonic stem cells

A

Correct damage to tissues of hop joins as it’s body is less capable of rejecting that.

17
Q

Name the gas that leaves the alveolus into the blood from the alveolus

A

Carbon dioxide

18
Q

Explain how a gas passes from the alveolus into the blood capillary

A

Oxygen diffuses from high concentration into the moist lining of the alveolus to a low concentration in the rich blood supply in the red blood cells.

19
Q 
GAS|INSPIRED AIR|  EXPIRED AIR
Ox   |      21%        |       \_\_\_%
CO  |      \_\_\_  %     |        4%
Nit   |      79%        |        79% 
H2o |      Varies      |        1%
A 
GAS|INSPIRED AIR|  EXPIRED AIR
Ox   |      21%        |       16%
CO  |      0.04%     |        4%
Nit   |      79%        |        79% 
H2o |      Varies      |        1%
20
Q

State what the investigation of a plant being discharged demonstrates

A

That carbon dioxide is needed for photosynthesis

21
Q

How would you completely remove all the chlorophyll from the lead before testing for starch?

A

Boil he leaf in ethanol in a test tube to remove chlorophyll.

22
Q

Name the chemical used to test for starch

A

Iodine

23
Q

Explain in a test using a leaf to test for starch to prove carbon dioxide is needed for photosynthesis why part of the leaf would be a yellow-brown colour

A

The sodium hydroxide solution absorbs the cabon dioxide which prevented the lead from carrying out photosynthesis. This meant that no starch is produced by a plant, therefore the colour would stay in a yellow/brown colour.

24
Q

What was the purpose of the glass container with water in a test for carbon dioxide’s use in photosynthesis?

A

It’s a controlled experiment

25
Q

Explain how the bell jar model shown can be used to illustrate inspiration (breathing in)

A
  1. The bell jar itself represents the ribcage, which protects the lungs.
  2. The glass tube represents the trachea and the bronchi.
    3 .The balloons represent the lungs as it’s inflated.
  3. The rubber sheet is the diaphragm contracting.
26
Q

What is the function of the nucleus in an algal(plant) cell?

A

It controls the cell’s activities

27
Q

What in the algal cell absorbs light energy for photosynthesis?

A

Large chloroplast

28
Q

What is the fiction of a cell wall?

A

Strengthens cell

Biol Resit (2 decks)

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