Both hydrogencarbonate and metal hydroxides are used to control over production of acid in the stomach. However, metal hydroxides are a better alternative than hydrogencarbonate because

1) Excessive hydrogencarbonate can make the stomach alkaline and trigger the production of even more acid.

2) Metal hydroxides are readily soluble in stomach acid and help increase the pH of the stomach above neutrality.

Which of the above is/are correct?

Which of these are artificial sweeteners?

1) Blackstrap Molasses

2) Aspartame

3) Saccharin

4) Maple Syrup

Select the correct answer using the codes below.

How do drugs counter the effect of certain enzymes?

1) Drugs prevent the attachment of substrate on active site of enzymes.

2) Drugs can inhibit the catalytic activity of the enzyme by restricting its chemical reactions.

Which of the above is/are correct?

Consider the following with reference to some microorganisms.

1) Blue-green algae cannot fix nitrogen directly from the atmosphere.

2) Azotobacter is a free living nitrogen fixing bacteria.

3) Klebsiella pneumonia can fix nitrogen only when associated with host plant roots.

Select the correct answer using the codes below.

What is/are the major differences between the process of “Dark fermentation” and “Photo- Fermentation”?

1) Photo-Fermentation is achieved by bacteria, but dark fermentation can be performed by fungi only.

2) Photo-Fermentation cannot be used to safely dispose radioactive wastes, whereas Dark fermentation can be.

Which of the above is/are correct?