Biology Year 12 Random Retrieval

This quiz contains all the questions in the year 12 biology section. The website will pick 20 questions at random.

1 / 20

What type of mutation is this ? ACCTGG becomes ACGTGG

Addition

Substitution

Deletion

2 / 20

On this diagram, what does C represent?

Loci

Homologous Chromosomes

Centromeres

3 / 20

How many tRNA molecules can fit into a ribosome at any time?

2

3

4

4 / 20

In eukaryotes, the pre-mRNA is modified by removing what?

Introns

Exons

Start Codons

5 / 20

As blood moves away from the heart, it travels in which type of blood vessel?

Artery

Vein

Aterioles

6 / 20

Why is it useful that the Bohr Effect reduces the percentage saturation of Haemoglobin with oxygen?

reduction in saturation also causes a reduction in partial pressure, so a concentration gradient is maintained.

The oxygen has unloaded from the haemoglobin, so it can be exhaled via the lungs.

The oxygen has unloaded from the haemoglobin, so it is available for aerobic respiration in the tissues

7 / 20

During the Bohr Effect, what happens to the affinity of haemoglobin for oxygen?

Lowers the affinity

Increases the affinity

It does not affect the affinity

8 / 20

If someone's PVR is 1.5dm³ min ^-1, and their tidal volume is 150 cm ³, how many breaths do they take in a minute?

15

10

22

7

9 / 20

Which type of cell travels to the site of infection, and secretes a chemical which kills infected cells?

B Lymphocytes

Cytotoxic T Cells

Mast Cells

10 / 20

On the diagram above, which structure is a lysosome?

B

C

D

11 / 20

Which of the following is a similarity between diffusion an osmosis?

Both are a movement of a substance across a concentration gradient.

Both are a movement of a substance down a concentration gradient

Both are a movement of a substance along a concentration gradient.

12 / 20

The process shown in the diagram is 'Cell ___________' (spell it correctly)

13 / 20

To look at a sample under a microscope, you need to prepare a temporary mount. Why does the specimen have to be thin?

To fit under the objective lens.

To increase magnification

To let light through

14 / 20

Assume the image of the scale bar in this picture is 2cm long. What is the magnification of this image?

x 200,000

x2,000

x20,000

15 / 20

True or false: Generally prokaryotic cells are larger than eukaryotic cells

TRUE

FALSE

16 / 20

The average human makes and breaks-down its own body mass in ATP every day ( approximately 70 kg). Why is this?

ATP cannot be stored.

ATP is excreted in urine.

ATP is hard to break down.

17 / 20

How many types of organic base are there in DNA and RNA?

3

4

5

18 / 20

Where do competitive inhibitors bind ?

The Active Site

Somewhere on the protein other than the active site.

19 / 20

What is the general formula for a saturated fatty acid?

C_nH_2nO_n

C_nH_nO₂

C_nH_2nO₂

20 / 20

What type of bond forms between two monosaccharides?

Peptide

Hydrogen

Glycosidic

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