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

Which number represents prophase 1 of meiosis?

3

4

6

2 / 20

What does RNA stand for?

Ribulose Nucleic Acid

Ribo Nucleic Acid

Rhino Nucleic Acid

3 / 20

Which word does NOT describe the genetic code?

Degenerate

Universal

Non-Overlapping

Interrupted

4 / 20

In the mass flow hypothesis, the water potential is reduced in the phloem near the sources. What will happen to water movement?

Water will move into the source cells via osmosis, from the phloem. Reducing the pressure in the phloem.

The same amount of water will move in as move out as it is now isotonic.

Water will move into the phloem via osmosis, increasing the pressure.

5 / 20

Xylem or Phloem ? - No end plates on these cells

Xylem

Phloem

6 / 20

Name the structures labelled B

Atrioventricular Valve

Semi - Lunar Valve

Bicuspid Valve

7 / 20

Name the structures labelled A

Atrioventricular Valve

Semi - Lunar Valve

Bicuspid Valve

8 / 20

Why does the blood flow in an opposite direction the the water?

So a steep concentration gradient is formed at the start.

So that a concentration gradient is maintained across the whole length of the lamella.

So that a steep concentration gradient is formed at the end.

9 / 20

Which muscles are contracted when you inhale?

Internal Intercostal Muscles and Diaphragm.

External Intercostal Muscles only.

External Intercostal Muscles and Diaphragm.

Diaphragm only.

10 / 20

Other than surface area to volume ratio, which is an example of a physiological adaptation, which allows an animal to live at hotter temperatures?

Small surface area:volume ratio.

Thicker hair.

Thicker layer of blubber or fat.

More water reabsorbed by the kidneys to reduce water loss.

11 / 20

Why can single celled organisms exchange many substances by simple diffusion over the plasma membrane?

Because the organelles are always located next to the plasma membrane.

Because there is always a concentration gradient.

Because the organisms have a small surface area to volume ratio.

Because the substances do not need to diffuse far (=short diffusion pathway).

12 / 20

Complete this sentence: Osmosis is the diffusion of water across a partially ________ membrane . Type your answer:

13 / 20

How long is one complete cell cycle on this graph?

12 hours

6 hours

24 hours

14 / 20

Name this organelle.

Chloroplast

Mitochondrion

Nucleus

15 / 20

An ion with a negative charge is called an anion. Which of the following is NOT an anion?

chloride

calcium

phosphate

16 / 20

Which process requires the use of ATP?

Facilitated Diffusion

Osmosis

Active Transport

17 / 20

In this experiment bacteria were grown in a growth medium containing N¹⁵. What isN¹⁵?

An isomer of Nitrogen.

An isochrome of Nitrogen

An isotope of Nitrogen

18 / 20

True or False : The enzyme DNA polymerase can only bind to double stranded DNA?

TRUE

FALSE

19 / 20

Which monomer is this polysaccharide made out of?

Alpha Glucose

Beta Glucose

Fructose

20 / 20

Which two types of polysaccharide form starch?

Amylose and Cellulose

Amylose and Amylopectin

Amylopectin and Cellulose

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