Question
The diagram shows a section of DNA, with four bases identified on one strand
Which sequence of bases would be on the other strand, starting from the top?
A AGTC B CTGA C GACT D TCAG
Answer/Explanation
Ans
B
Question
When a food substance is tested with iodine solution, which colour shows the presence of
starch?
A blue-black
B brown
C orange
D purple
Answer/Explanation
Ans
A
Question
A test was performed on a food substance. A positive result was shown by a colour change to
blue-black.
What solution was used for the test?
A biuret solution
B DCPIP solution
C iodine solution
D Benedict’s solution
Answer/Explanation
Ans: C
Question
Which row is correct for a positive food test for vitamin C?
Answer/Explanation
Ans
B