Biology

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Biology

You will be given 18 biology questions to solve in 30 minutes or 1 minute and 40 seconds (100 seconds) per question.

1 / 18

If a glucose molecule became incorporated as a non­terminal component of starch, which two regions, labelled i to v, would be involved in forming glycosidic bonds?

2 / 18

Antibiotics are becoming less effective due to:

3 / 18

Which one of the following labels, i to v, represents a nucleotide?

4 / 18

The increase in the frequency of one phenotype in a wild population of fish could be due to:
1. an advantageous mutation
2. increased reproductive success of individuals with that phenotype
3. a change in the environment

5 / 18

The following organelles are involved in processing amino acids into glycoprotein:
1. Golgi apparatus
2. Ribsomes
3. RER
Which sequence is correct for this process?

6 / 18

The diagram below represents the fluid mosaic model of the cell (surface) membrane.

Only two of the labelled molecules have both hydrophobic and hydrophilic areas. Which two molecules are they?

7 / 18

Which adaptation cannot help increase the speed of transmission in a motor neurone?

8 / 18

A food item was burned in pure oxygen and released 830 kJ of energy. An identical food item of the same mass was found to produce 8 ATP’s in respiration.

Assuming it takes 31 kJ to produce one ATP molecule, estimate the efficiency of respiration.

9 / 18

In a set of genetic crosses the offspring produced showed the same phenotype ratio of 9:3:3:1. Which of the following statements could be true?
1. two genes each with two alleles were studied
2. all parents were heterozygous
3. some offspring had a phenotype different to the parents
4. some offspring had a phenotype the same as the parents

10 / 18

Which is likely to contain the most mitochondria?

11 / 18

Which of the following transport mechanisms require the use of protein molecules found in membranes and ATP?
1. Active transport
2. Diffusion
3. Facilitated diffusion

12 / 18

Cross over values (COV’s) can be considered as the relative distance between genes and are used to help construct chromosome maps. Four genes, called P, Q, R and S, are found on the same chromosome. Use the following COV’s to work out the sequence of the four genes.
P to Q = 33

Q to R = 8

R to S = 15

P to S = 10

P to R = 25
The sequence of the genes is:

13 / 18

If an animal body cell contained 36 chromosomes, which row in the table is correct?

14 / 18

In the process of ventilation the following occur:
1.pressure in thorax increases
2.volume of thorax increases
3.diaphragm goes down
4.ribcage goes down
Which of these occur during inhalation?

15 / 18

Which one of the following is not involved in defending the body against infection?

16 / 18

The family pedigree shows that boy C has a genetic condition. No other member of the family shows the same genetic condition.

Which one of the following could NOT explain why boy C has the condition?

17 / 18

In a reflex arc that comprises a pain receptor cell in the skin, three neurones and a muscle (effector), the number of synapses found in the central nervous system (CNS) is:

18 / 18

Which one of the following is NOT true of human hormones?

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