Assertion: Protein denaturation is always irreversible.

Reason: A denatured protein cannot be renatured.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Assertion: There are nine essential amino acids which humans must obtain from their diet in order to prevent protein-energy malnutrition and resulting death.

Reason: Histidine is not synthesized in adults.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: Strictly speaking proteins are made up of amino acid residues rather than amino acids.

Reason: When a peptide bond is formed, a water molecule is lost.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: Animals use fats for long term energy storage.

Reason: The calorific value of fats is higher than that of carbohydrates and proteins.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: Arachidonic acid can be regarded as a conditional essential fatty acid.

Reason: It does become essential if a deficiency in linoleic acid.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: Cholesterol is a lipid required and biosynthesized by all animal cells.

Reason: It is an essential structural component of all animal cell membranes.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: An agar plate is used to provide a growth medium using a mix of agar and other nutrients in which microorganisms, including bacteria and fungi, can be cultured and observed under the microscope.

Reason: As a gel, an agar or agarose medium is porous and therefore can be used to measure microorganism motility and mobility.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: Some animals, particularly ruminants and termites, can digest cellulose.

Reason: They can produce cellulose.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

It is said that elemental composition of living organisms and that of inanimate objects (like earth’s crust) are similar in the sense that all the major elements are present in both. Then, what would be the difference between these two groups? Choose a correct answer from among the following:

1. Living organisms have more gold in them than inanimate objects.

2. Living organisms have more water in their body than inanimate objects.

3. Living organisms have more carbon, oxygen and hydrogen per unit mass than inanimate objects.

4. Living organisms have more calcium in them than inanimate objects.

Many elements are found in living organisms either free or in the form of compounds. One of the following is not, found in living organisms.
1. Silicon
2. Magnesium
3. Iron
4. Sodium