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

What type of selection is shown on the graph?

Length of a giraffe's neck.

Thickness of blubber in a weddel seal.

Human Birth Weight.

2 / 20

What type of mutation is this ? ACCTGG becomes ACGTGG

Addition

Substitution

Deletion

3 / 20

What molecule is made in eukaryotic transcription?

mRNA

pre-mRNA

tRNA

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

Once blood leaves arteries, which type of blood vessel will it enter?

Veins

Arterioles

Capillaries

6 / 20

Haemoglobin is a quaternary protein, how many polypeptide chains make up a single molecule of haemoglobin?

7 / 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.

8 / 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

9 / 20

A doctor vaccinated a group of patients against poliomyelitis. He gave each patient two doses of vaccine, 3 months apart. Calculate the percentage increase in the mean concentration of antibodies in blood between samples 2 and 3.

17.5

18.5

0.95

10 / 20

Which type of membrane protein is not involved in facilitated diffusion?

Carrier proteins

Hormone receptor proteins

Channel proteins

11 / 20

Why can't glucose diffuse directly through the phospholipids?

Because it is too large

Because it is polar

Because it is large and polar

12 / 20

Which phase of mitosis is when the chromosomes condense?

Metaphase

Prophase

Anaphase

13 / 20

To look at a fresh sample under a light microscope, you'll need to prepare a temporary mount. What is NOT used to stick the specimen to the microscope slide?

Water

Glue

Oil

14 / 20

What is the function of this organelle?

Processing and packaging Lipids

Synthesising and processing lipids

Folding and processing proteins

15 / 20

What type of bond forms between water molecules?

Hydrogen

Ionic

Hydroxide

16 / 20

What charge will be on the hydrogen atoms in this molecule?

A full negative charge

A partial Negative charge

A partial positive charge

17 / 20

Which two letters represent 5' ends of the DNA strand?

D & G

D & F

E & G

18 / 20

Which direction does the enzyme move along the template strand A?

3' to 5'

5' to 3'

19 / 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.

20 / 20

Enzymes are biological catalysts: they speed up reactions. This allows the reactions to happen at...

higher temperatures

lower temperatures

lower pH's

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

Hydrogen ionconcentration is used to calculate pH. Which of the following statements is true?

Acidic solutions have a high concentration of hydrogen ions.

Acidic solutions have a low concentration of hydrogen ions.

Basic solutions have a high concentration of hydrogen ions.

2 / 20

Which direction does the enzyme move along the template strand A?

3' to 5'

5' to 3'

3 / 20

On the above diagram, name the group labelled B.

Organic Base

Pentose Sugar

Phosphate

4 / 20

Viagra is a similar shape to cyclic GMP ( cGMP). Both will block an enzyme called PDE5. cGMP causes vasodilation. What sort of inhibitor is Viagra?

Competitive

Non-competitive

5 / 20

Describe what the line would look like when a 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.

6 / 20

In this reaction, what percentage difference in energy needed for an enzyme catalysed reaction, compared to an uncatalysed one?

16.6

16.7

83.3%

7 / 20

Which word best describes the shape of the substrate?

The same as the active site

Complementary to the Active Site

Opposite to the active site

8 / 20

Which letter represents the enzyme-substrate complex in this diagram?

9 / 20

Is the reaction on the above diagram exothermic or endothermic?

Exothermic

Endothermic

10 / 20

On the above diagram, which letter represents the activation energy with an enzyme?

11 / 20

What level of protein structure contains alpha helices and beta pleated sheets?

Secondary

Tertiary

Quaternary

12 / 20

What is wrong with amino acid C?

There is an OH missing off the N group.

There is an extra OH group on the acidic group.

There is an OH group off the central carbon atom.

13 / 20

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

Amine

Ammonium

Azide

14 / 20

Which best represents the hydrophobic area on this diagram?

15 / 20

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

A fatty acid chain

A glycerol molecule

A phosphate 'head'

16 / 20

It forms strong, straight fibres called what ?

Myofibres

Microfibrils

Myosin

17 / 20

Which monomer is this polysaccharide made out of?

Alpha Glucose

Beta Glucose

Fructose

18 / 20

Which monomer is starch made out of?

Alpha Glucose

Beta Glucose

Fructose

19 / 20

Does this diagram show a glycosidic bond?

Yes

20 / 20

Which of the following is a type of disaccharide?

galactose

fructose

sucrose

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

What happens to a B lymphocyte when it is activated?

Agglutination

Divides by Mitosis

Phagocytosis

2 / 20

Name the contents found in C.

Lysopeptide

Lysosome

Lysozyme

3 / 20

On the diagram above, which structure is a lysosome?

4 / 20

When investigating osmosis, why is it better to calculate the percentage change in mass, rather than just the change in mass?

Percentage change is more accurate.

Percentage change is more reliable.

Percentage change takes into account any difference in starting mass.

5 / 20

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

TRUE

FALSE

6 / 20

Beetroot is a purple vegetable, the cells of which contain a pigment called Betalain. 4 tubes are set up with water and beetroot incubated at different temperatures: 20, 40, 60 and 80 ⁰C. What is the dependent variable of this experiment?

The temperature the tubes are incubated at.

The length of time it is incubated for.

The colour change of the water.

7 / 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

8 / 20

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

9 / 20

If you were to investigate mitosis in plant tissue, which part of a plant would you choose to look at?

Pallisade cells in a leaf

Root Tips

Phloem cells in the stem

10 / 20

What does SEM stand for?

Scanning Electron Micriscope

Sensitive Electron Microscope

Superior Electron Microscope

11 / 20

What does TEM stand For?

Transverse Electron Microscope

Tele Electron Microscope

Transmission Electron Microscope

12 / 20

The image shows palisade cells in a leaf. Line B (length) in the image measures 3.5 cm, and the actual cell measures 7μm. What is the magnification of this image of the palisade cell?

x2000

x5000

x500

13 / 20

True or False : plasmids are passed on by binary fission only.

TRUE

FALSE

14 / 20

Which layer controls movement in and out of the cell?

15 / 20

What substance is layer A made out of?

Cellulose

Other' Polysaccharides

Glycoprotein

16 / 20

Which of the following organelles has the SAME structure in prokaryotes and eukaryotes.

Nucleus

Plasma Membrane

Cell Wall

17 / 20

Name part C

Stroma

Grana

Lamella

18 / 20

What is the main function of this organelle?

Processing and packaging Lipids

Synthesising and processing lipids

Folding and processing proteins

19 / 20

This is found inside most eukaryotic cells, what is A?

Plasma Membrane

Nuclear Membrane

Thylkoid Membrane

20 / 20

What is the best definition of a eukaryotic cell?

Not a prokaryotic cell.

A cell that contains membrane bound organelles.

A plant or animal cell.

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

How does an increase in wind speed, increase the rate of transpiration?

Increases or maintains the water potential gradient between the air inside the leaf, and the air outside.

Increase in wind is detected by small hairs on the leaves, which open the stomata.

Decreases the water potential gradient between the air inside the leaf, and the air outside.

2 / 20

Xylem or Phloem ? - No end plates on these cells

Xylem

Phloem

3 / 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.

4 / 20

What has happened at position B?

The Atrioventricular valves open.

The Semi- Lunar valves close.

The Semi- Lunar valves open.

5 / 20

When will the valves close?

When the pressure is lower in front of the valve and higher behind it.

When the pressure is higher in front of the valve, and lower behind it.

When the pressure is equal.

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

Haemoglobin is a quaternary protein, how many polypeptide chains make up a single molecule of haemoglobin?

8 / 20

Which number represents a layer which is 2 or 3 times thicker in desert plants?

9 / 20

Which number represents cells that can control water loss?

10 / 20

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

11 / 20

Which letter represents the part that can control water loss?

12 / 20

The Great White Shark and Black-tipped Reef Shark are two species which must keep swimming to stay alive. Why is this?

To be able to hunt for prey 24 hours a day.

To stop them sinking.

To maintain a flow of oxygenated water over their gills.

13 / 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.

14 / 20

Emphysema is caused by what?

Too much exercise

Cancer

CVD

Smoking or long term air- pollution

15 / 20

What does Pulmonary Ventilation Rate (PVR) mean?

Volume of blood that passes through the lung in a minute.

Total volume breathed in over a minute during exercise.

Total volume breathed in over a minute at rest.

The time it takes to exhale a full forced vital capaity from the lungs.

16 / 20

What is the correct term for the cells which make up the alveolar wall?

Ciliated Epithelium

Capillary Epithelium

Alveolar Endothelium

Alveolar Epithelium

17 / 20

Which muscles contract during forced expiration?

External Intercostal Muscles

Internal Intercostal Muscles

Diaphragm

None

18 / 20

What shape is the diaphragm when it is contracted?

Domed Up

Domed Down

Zigzag

Flat

19 / 20

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

Thicker layer of blubber or fat.

Large surface area.

Thin, coarse hair.

High metabolism.

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

How do Microbiologists test for bacterial susceptibility to antibiotics?

Measuring the size of bacterial colonies.

Measuring the Inhibition Zone.

Monoclonal Antibodies.

2 / 20

Which of the following has contributed to the development of antibiotic resistant strains of bacteria?

Prescription of anibiotics for serious bacterial infections only.

Patients completing the full course of antibiotics.

Over prescription of antibiotics.

3 / 20

Which of the following is an example of directional selection?

Human Birth Weight

Length of a giraffe's neck.

Best camouflaged colour of mouse's coat in woodland.

4 / 20

True or false - The Founder Effect is a type of genetic bottle neck?

TRUE

FALSE

5 / 20

Which of the following is a mutagenic agent?

Ultra Violet Radiation

Infra Red Radiation

Visible Light

6 / 20

Some gene mutations will have no effect at all on the polypeptide, why not?

The genetic code is universal

The genetic code is degenerate

DNA is double stranded

7 / 20

Which number represents prophase 1 of meiosis?

8 / 20

How many chromatids are present in a human cell at the start of meiosis?

9 / 20

Before meiosis starts, the primary spermatocyte or oocyte replicates its chromosomes and organelles. What is this phase called?

Prophase

Anaphase

Interphase

10 / 20

On this diagram, what does D represent?

Locus

Homologous Chromosomes

Centromeres

11 / 20

What word describes cells which contain single chromosomes?

Haploid

Diploid

Polyploid

12 / 20

What molecule does the tRNA carry?

A specific amino acid

A specific base

A specific fatty acid

13 / 20

Where does translation take place?

Cytoplasm

Nucleus

Ribosome

14 / 20

What is transcription?

Replicating DNA

Turning DNA into pre - mRNA

Turning pre-mRNA into mRNA

15 / 20

What does the 'm' stand for in mRNA?

Migrating

Multiple

Messenger

16 / 20

What is a difference between RNA and DNA?

DNA is made of of nucleotides, RNA is made out of amino acids.

DNA uses the genetic code, RNA uses sequences of amino acids.

DNA is double stranded, RNA is single stranded.

17 / 20

What is a 'sister chromatid' or 'sister chromosome'?

The same chromosome ( same number e.g. 21) but possibly with different alleles. Can be linear, or X shaped.

An identical copy of a chromosome, with identical alleles. Joined by the centromere to form a X shape.

A pair of linear, single chromosomes.

Two X sex- chromosomes (XX) .

18 / 20

How many chromosomes do most human cells contain?

19 / 20

Describe how prokaryotic DNA is stored

Wound around histone proteins

As pairs of linear chromosomes

Supercoiled

Uncoiled

20 / 20

How would you describe the shape of prokaryotic chromosome, when compared to a eukaryotic chromosome?

Circular

Linear

Double Stranded

Double helix

Your score is

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