Biology Random Retrieval Y12

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

Babiana Ringens is a South African plant, which flowers on the ground. They are pollinated by birds, so to attract them they have evolved a sturdy stalk with no leaves or flowers which acts as a bird perch.

Physiological

Anatomical

Behavioural

2 / 20

True or false : The Founder Effect is a type of genetic drift?

TRUE

FALSE

3 / 20

Xylem or Phloem ? - This type of cell is living, but with few organelles.

Xylem

Phloem

4 / 20

What has happened at position C?

The Atrioventricular valves open.

The Atrioventricular valves close.

The Semi- Lunar valves open.

5 / 20

What do we call the arteries which supply the heart muscle?

Myocardial Arteries

Coronary Arteries

Cardiac Arteries

6 / 20

Using the diagram, which part is a lamella?

7 / 20

Cresol red is an indicator which goes clear at a low pH. A plate of agar jelly with cresol red added was made, and two blocks were cut out. Block A measured 10mm x 10mm x 10mm. Block B measured 20mm x 7mm x 7mm. You have chosen one which will decolourise the quickest, why did you choose that block?

Because it had the smallest surface area to voume ratio.

Because it had the largest surface area to volume ratio.

Because it had the largest Volume to surface area ratio.

I guessed !

8 / 20

A doctor vaccinated a group of patients against poliomyelitis. He gave each patient two doses of vaccine, 3 months apart. Explain the differences between the mean concentrations of antibodies in blood samples 1 and 2 .

First dose of vaccine has failed to cause activation of B cells.

First dose of vaccine has caused clonal selection of B cells.

First dose of vaccine contained antibodies.

9 / 20

Look at the above graph, what is the concentration of sodium chloride inside the potato cells?

0.4 mol dm ^-3

0.35 mol dm ^-3

15 mol dm ^-3

10 / 20

In the above diagram, there are three membrane proteins: A, B and C. Which represents where facilitated diffusion occurs?

11 / 20

True or False: In order to function, carrier proteins have to change shape.

TRUE

FALSE

12 / 20

At which time does mitosis take place?

6 - 12 hours

0-12 hours

At hour 12

13 / 20

The Christae of the mitochondrion shown in this picture are 2m x 10^-8wide (A). How many 'nm' is this ?

200nm

20nm

2nm

14 / 20

Which of these structures is completely absent in eukaryotic cells?

15 / 20

Where do competitive inhibitors bind ?

The Active Site

Somewhere on the protein other than the active site.

16 / 20

How many naturally occurring amino acids are there in all living things?

17 / 20

What type of reaction is the formation of a triglyceride from its subunits?

Condensation

Hydrolysis

Lipolysis

18 / 20

It is highly branched, what type of glycosidic bond form the base of the branches?

1-4 Glycosidic Bond

1-6 Glycosidic Bond

1-2 Glycosidic Bond

19 / 20

This component of starch is coiled. What is the advantage to the organism storing it?

A coil gives a more compact shape, so less space needed for storage.

A coil is a stable shape.

A coil is easily broken down to release the energy.

20 / 20

What type of sugar is fructose?

Pentose

Hexose

Heptose

Your score is

Biology Molecules Random Retrieval

This quiz contains all the questions in the Biology Molecules section. The website will pick 20 questions at random.

1 / 20

What type of reaction is involved in the breakdown of ATP?

Condensation

Hydrolysis

2 / 20

The diagram shows a template strand of DNA. Which of the following is the order the first 5 new bases will be added (first in the sequence, would be first to be added)?

TAGCC

TGCCA

ATCGG

3 / 20

A single DNA strand has two ends - one called 5 prime (5') and one called 3 prime (3'). To which end of the new DNA strand does the enzyme bind in DNA replication?

4 / 20

Which of the following is not true of RNA?

It contains the organic bases A, T, C & G.

It is shorter than DNA.

It is much shorter than most DN strands.

5 / 20

How many bonds form between a 'C' and a 'G' ?

6 / 20

What type of bond forms between complementary base pairs?

Phosphodiester

Ionic

Hydrogen

7 / 20

On the above diagram, name the group labelled B.

Organic Base

Pentose Sugar

Phosphate

8 / 20

Describe what the line would look like when a non-competitive inhibitor was added to the reaction.

The line would increase less steeply, but it would eventually plateau at the same rate as withut an inhibitor.

The line would be less steep at the start, and would plateau at a rate below the line without an inhibitor.

The line would go up at the same gradient at the start, but would then plateau at a lower rate.

9 / 20

This model of enzyme action has now been replaced by another more recent one. What is the more recent model called?

Lock and Key Model

Induced Fit Model

Flexible Fit Model

10 / 20

True or False : Endothermic enzyme controlled reactions do not require activation energy?

TRUE

FALSE

11 / 20

What colour shows a positive result?

Brick red

Blue

Purple

12 / 20

What is the name of the NH₂ group on an amino acid molecule?

Amine

Ammonium

Azide

13 / 20

If this diagram represented the plasma membrane of an epithelial cell in a human small intestine. What solutions would be on side'a' and side 'b'?

Digested juices and blood

Cytoplasm and digested juices

Blood and air

14 / 20

On the above diagram, what does structure '3' represent?

A fatty acid chain

A glycerol molecule

A phosphate 'head'

15 / 20

On the above diagram, what does structure '2' represent?

A fatty acid chain

A glycerol molecule

A phosphate 'head'

16 / 20

Which of the following is not true about triglycerides?

Insoluble in water.

Insoluble in lipids.

Soluble in lipids.

17 / 20

What is the formula for glycerol?

C₄O₄H₈

C₃O₃H₈

C₃O₃H₆

18 / 20

This polysaccharide of glucose is branched. What is the advantage to the organism of branching ?

It fits around organelles easily.

More sites for enzymes it to bind to.

Can form structural support iside cells.

19 / 20

Which reagent is used to test for reducing sugars?

Biurets

Benecol

Benedicts

20 / 20

Molecule D is NOT alpha glucose. What is wrong with it ?

The OH group is in the wrong place on carbon 1

The OH group is in the wrong place on carbon 2

The OH group is in the wrong place on carbon 4

Your score is

Cells Random Retrieval

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

1 / 20

Read the above passage. Before reweighing, the potato was blotted dry. Which of the following is NOT a reason for doing this?

To remove excess water which will affect the mass.

Because different amounts of water will be on different pieces of potato.

It removes water.

2 / 20

True or False: Facilitated diffusion can use ATP

TRUE

FALSE

3 / 20

True or false : Active transport can go down a concentration gradient, or up a concentration gradient.

TRUE

FALSE

4 / 20

True or false : Facilitated diffusion can use channel proteins or transport proteins, but active transport only uses transport proteins.

TRUE

FALSE

5 / 20

Which part of the phospholipid bilayer prevents sodium ions leaving via simple diffusion?

Hydrophilic Heads

Hydrophobic Tails

Glycocalyx

6 / 20

What effect does having more of molecule 'I' have on the membrane?

It becomes more Fluid

It becomes less Fluid

It becomes more hydrophillic

7 / 20

Give an example of a molecule which would pass through F

Oxygen

Glucose

Chloride ions

8 / 20

What name describes the double layered structure of a membrane? (Spell it correctly)

9 / 20

Which part is hydrophilic?

10 / 20

At the end of telophase, the cytoplasm cleaves. What is this process called? ( spell it correctly)

11 / 20

Name the area where the sister chromosomes together, and attach to the spindle fibres here. (Spell it correctly)

12 / 20

What term is given to describe G1 phase, S phase and G2 phase combined? ( Spell it correctly)

13 / 20

What happens in G2 phase?

DNA is replicated

Organelles are replicated

Proteins are Replicated

14 / 20

Which organelle will be found in pellet B?

Mitochondria

Ribosomes

15 / 20

What term describes the ability to see two separate points, as two separate points. Rather than one large point on an image ? (You need to spell it correctly!)

16 / 20

Name the method of division, that prokaryotes use for replication ( spell it correctly!)

17 / 20

True or false : Prokaryotic DNA coils around histones.

TRUE

FALSE

18 / 20

Which of the following organelles has a different structure in prokaryotes when compared to eukaryotes.

Cell Membrane

Cytoplasm

Ribosomes

19 / 20

Name this organelle.

Chloroplast

Mitochondrion

Nucleus

20 / 20

Name this organelle.

Rough Endoplasmic Reticulum

Smooth Endoplasmic Reticulum

Golgi Body

Your score is

Exchanges of Substances with the Environment Random Retrieval

This quiz contains all the questions in the Exchanges of Substances with the Environment section. The website will pick 20 questions at random.

1 / 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.

2 / 20

The Mass Flow Hypothesis, is the best explanation for translocation in plants. What does it suggest happens at 'sources'?

Substances move by diffusion from a high concentration where they are made, to a lower concentration in the phloem.

Substances are actively transported out of the source cell into the phloem, reducing the water potential in the phloem.

Substances are stored, reducing the concentration in the source, creating a concentration gradient.

3 / 20

Which direction will the bubble move?

Towards the beaker

Towards the plant

4 / 20

The evaporation of water molecules out of the leaf, 'pulls' the water molecules behind up. What is this 'pull' called ?

Cohesion

Tension

Mass Flow

5 / 20

What is transpiration the movement of?

Water, with dissolved organic substances.

Pure water.

Water with dissolved mineral ions.

6 / 20

Xylem or Phloem ? - This type of cell is living, but with few organelles.

Xylem

Phloem

7 / 20

What is a Thrombosis?

A blood clot that forms in the lumen when the lining of an artery becomes damaged.

A blood clot that forms under the endothelium when an artery becomes damaged.

Swelling caused by highblood pressure.

8 / 20

What happens during Ventricular Systole?

Atrial wall is relaxed, but the ventricular wall is contracted. The Atrioventricular valve is closed, but the Semi Lunar valve is open.

Atrial wall is relaxed, but the ventricular wall is contracted. The Atrioventricular valve is open, but the Semi Lunar valves are closed.

Atrial and ventricular walls are contracted, and the Atrioventricular valve is closed. The Semi Lunar valves are open.

9 / 20

Why can we not state using this data, CVD is caused by smoking?

Because P only = 0.006 for the linear trend.

Because the 95% Confidence Intervals overlap for two of the results.

Because CVD may have been caused by other things such as diet, exercise , age etc.

10 / 20

Does this chart show a causal relationship between Risk of CVD and smoking?

Yes

11 / 20

What do we call the arteries which supply the kidneys?

Hepatic Arteries

Carotid Arteries

Renal Arteries

12 / 20

In which direction ( if any), would a curve be for humming bird haemoglobin?

Same as human adult

13 / 20

What is it called, when Carbon Dioxide causes the dissociation curve to shift?

Bear Effect

Bohr Effect

Bahrain Effect

14 / 20

Which number represents the layer where gaseous exchange happens in plants?

15 / 20

Which letter represents the part that can control water loss?

16 / 20

What is 'Tidal Volume'?

Average volume inhaled and exhaled when at rest.

Average volume inhaled and exhaled during exercise.

Maximum volume inhaled and exhaled during a deep breath.

Minimum volume inhaled and exhaled at rest.

17 / 20

Which of the following is the correct sequence for inhalation?

Internal Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lungs decrease

External Intercostal Muscles and Diaphragm contract. Thoracic volume decreases. Pressure in the lungs decreases.

External Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lugs increases.

External Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lungs decreases.

18 / 20

Is it important which way round the numbers go when writing a ratio?

Yes

19 / 20

What is the surface area to volume ratio of a spongy mesophyll cell with the surface area of 24,000 µm ², and a volume of 110,000µm ³?

13.3 : 1

1 : 0.22

0.22 : 1

4.58 : 1

20 / 20

What is the surface area to volume ratio of a palisade cell with a volume of 120,000 µm ³ and a surface area of 6500 µm²?

8.33 : 1

1 : 18.46

1 : 0.12

0.12 : 1

Your score is

Genetic Variation & Information Random Retrieval

This quiz contains all the questions in the Genetic Variation & Information section. The website will pick 20 questions at random.

1 / 20

True or false : The Founder Effect is a type of genetic drift?

TRUE

FALSE

2 / 20

A sheep cheek cell which is not dividing has 54 chromosomes, how many chromatids will be present during Meiotic Prophase 1 in the testes?

108

3 / 20

How does recombination increase variation?

It swaps over the same sections of chromosomes, which will contain the same alleles.

It swaps over the same sections of homologous chromosomes, which may contain different alleles.

It swaps genes between different pairs of chromosomes (e.g No21. with 19) , which will contain different alleles.

4 / 20

During recombination ( crossing over), genetic material can be swapped between which two structures?

Homologous Chromosomes

Sister Chromosomes

5 / 20

How is variation introduced during prophase 1?

Independent Segregation

Crossing Over

Mutation

6 / 20

Which number represents metaphase 1 of meiosis?

7 / 20

There are now two identical copies of each chromosome, held together by the centromere. Which term best describes these identical copies?

Homologous Chromosome

Sister Chromatids

Homozygous Chromosomes

8 / 20

On this diagram, what does C represent?

Loci

Homologous Chromosomes

Centromeres

9 / 20

What word describes cells which contain pairs of chromosomes?

Haploid

Diploid

Polyploid

10 / 20

What molecule is formed at the end of translation?

Polysaccharide

Mature RNA

Polypeptide

11 / 20

Where does translation take place?

Cytoplasm

Nucleus

Ribosome

12 / 20

What molecule is made in eukaryotic transcription?

mRNA

pre-mRNA

tRNA

13 / 20

Which term describes the specific attraction of bases?

Complementary Base Pairing

Conservative Base Pairing

Friendly Base Pairing

14 / 20

The genetic code on RNA is read in a set of three bases called a...

Triplets

Codons

Anticodons

15 / 20

What does RNA stand for?

Ribulose Nucleic Acid

Ribo Nucleic Acid

Rhino Nucleic Acid

16 / 20

What do H and h represent?

Different genes

Different Alleles

Different loci

17 / 20

On this diagram, what does B represent?

Sister Chromatids

Homologous Chromosomes

Loci

18 / 20

How many chromosomes do most human cells contain?

19 / 20

What is an allele?

A similar gene

A different gene

A different form of the same gene

A cluster of genes

20 / 20

What is the position of gene on a chromosome called?

Locus

Allele

Centromere

Centriole

Your score is

Recent Posts

Categories