Bio f4 chap 4

Question 1

How perspiration helps to lower the body temperature?

Answer 1

• condensation of sweat from the surface of our skin will use heat energy from our body

Question 2

Effect of protein deficiency in a diet on the hair and nails of an individual

Answer 2

• hair fall
• soft and brittle nails

Question 3

Give your opinion on the intake of synthetic steroids to build body muscles.

Answer 3

• synthetic steroid can help in building muscles
• lead to side effects
• increase in blood pressure, infertility and risk of stroke

Question 4

Why the RNA structure is shorter than the DNA structure?

Answer 4

• RNA is produced from a small part of DNA called a gene

Question 5

Explain the possibility that may occur if a cell does not have a nucleic acid.

Answer 5

• cell cannot transfer inheritance information
• cannot determine the characteristics in living organisms
• cells will die becoz they are unable to produce important protein for their survival

Question 6

Suggest what needs to be done to reduce the starch in potatoes during food preparation.

Answer 6

• soak cut potatoes in ice for a long period of time (hypotonic)
• remove as much as possible the starch