Biology

What substances do X and Y represent?

Use the following equations to answer the question below I - Boiled saliva + starch → X II - Fresh…

6 years ago

Which of the following enzymes is not one of the main classes of enzymes?

A. Sucrase B. Amylases C. Proteases D. Lipases Correct Answer: Option A A. Sucrase

6 years ago

Enzymes can be inactivated by certain chemical substances in the body called?

A. catalysts B. inhibitors C. substrates D. activators Correct Answer: Option B B. inhibitors Explanation Enzyme inhibitors are substances which…

6 years ago

The colour that is associated with a positive iodine test is?

A. brown B. red C. blue-black D. yellow Correct Answer: Option C C. blue-black

6 years ago

In a test for non-reducing sugars like sucrose, what is the significance of adding dilute hydrochloric acid to the original sugar solution? To

A. hydrolyse the non-reducing sugar B. accelerate he rate of the reaction C. stabilize the medium D. sterilize the solution…

6 years ago

Biuret’s test is carried out on a food substance to indicate the presence of?

A. vitamins B B. fats C. proteins D. starch Correct Answer: Option C C. proteins

6 years ago

Micronutrients essential for the synthesis of chlorophyll include?

A. iron and potassium B. iron and magnesium C. magnesium and calcium D. magnesium and potassium Correct Answer: Option B…

6 years ago

In testing for starch in a leaf, the leaf is boiled in alcohol to?

A. kill the cells B. soften the leaf C. enable chemicals penetrate the leaf D. decolourise the leaf Correct Answer:…

6 years ago

The mode of nutrition common to green plants is?

A. autotrophic B. heterotrophic C. holozoic D. saprophytic Correct Answer: Option A A. autotrophic

6 years ago

A neurone that transmits impulses directly from sensory cells is called?

A. an afferent neurone B. an efferent neurone C. a relay neurone D. a peripheral neurone Correct Answer: Option A…

6 years ago