35. Chemicals used to kill weeds are called as:
a) Insecticides
b) Fungicides
c) Herbicides
d) Fumigants
e) None of these.
36. The cytoplasm consists of several types of structures, which are called:
a) Protoplasm
b) Nucleus
c) Cytochromes
d) Organelles
e) None of these.
37. The structure of DNA was elaborated by Watson and Crick in:
a) 1909
b) 1923
c) 1945
d) 1953
e) None of these.
38. In a DNA molecules, the rule for base pairing is:
a) Adenine always bound with thymine and cytosine with guanine
b) Adenine always bound with cytosine and thymine with guanine
c) Adenine always bound with guanine and cytosine with thymine
d) Adenine always bound with uracil and cytosine with guanine
e) None of these.