151. The first land vertebrates were
(A) dipnoi
(B) amphibia
(C) reptilia
(D) aves
152. All life on planet earth is powered by
(A) solar energy
(B) thermal energy
(C) tidal energy
(D) kinetic energy
153. Recombinant DNA is introduced in to host cell by means of
(A) phage
(B) vector
(C) bacteria
(D) enzyme
154. In cystic fibrosis, the patient lacks a gene that codes for trans-membarene carrier of
(A) sodium ion
(B) carbon dioxide
(C) chloride ion
(D) potassium ion
155. Which gene is located on linkage group number 11 in man
(A) sickle cell anemia
(B) leukemia
(C) albinism
(D) all of these
156. In birds the sex is determined by the type of
(A) sperm
(B) autosomes
(C) egg
(D) none of these
157. In RNA nucleotides are attached by
(A) peptide bonds
(B) hydrogen bonds
(C) covalent bond
(D) phosphodiester bond
158. The chromosome is
(A) gene
(B) genes + protein
(C) DNA + genes
(D) gene + protein
159. The human body contains water
(A) 60-80%
(B) 70-90%
(C) 75-95%
(D) 80-90%
160. Environment is a source of
(A) food
(B) shelter
(C) clothing
(D) all of these