Jamb Biology 1979 Past Questions and Answers

Question 31:

• JAMB 1979

Which one of the following is not an excretory product?

A. Urine
B. Sweat
C. Faeces
D. Salts
E. Carbon-dioxide

Question 32:

• JAMB 1979

Bacteria inhabiting legume root nodules and which add atmospheric nitrogen to the soil are referred to as

A. Denitrifying bacteria
B. Nitrifying bacteria
C. Nitrogen fixing bacteria
D. Nitrogen freeing bacteria
E. Nitrogen putrefying bacteria

Question 33:

• JAMB 1979

One of the following statement is not true of viruses

A. They are micro-organisms
B. They are smaller than bacteria
C. They can be seen with an ordinary light microscope
D. They cause tobacco disease
E. They cause polio and smallpox

Question 34:

• JAMB 1979

If you cross breed a tall variety (Tt) of maize with a short variety (tt), the ratio of tall to short plants in the offspring will be

A. 2:1
B. 1:2
C. 1:1
D. 1:3
E. 3:1

Question 35:

• JAMB 1979

The digestive enzyme that coagulates proteins in milk is

A. Ptyalin
B. Pepsin
C. Renin
D. Trypsin
E. Amylase