Q. Which of the following is responsible for controlling hereditary characters of the living cells?
(A) Enzyme
(B) Hormone
(C) RNA
(D) None of the above
Ans: (D)
Q. The unit of heredity in our body is called
(A) Chromosome
(B) DNA
(C) Gene
(D) Nucleus
Ans: (C)
Q. Gene is
(A) A segment of DNA
(B) A segment of DNA and histone
(C) A segment of DNA, RNA and histone
(D) All of the above
Ans: (A)
Q. Who delivered the principle of ‘jumping gene’?
(A) Gregor Johann Mendel
(B) Tomas Hunt Morgan
(C) Barbara Mc Clintock
(D) Watson and Crick
Ans: (C)
Q. Which compound present in D.N.A. does not form amino acid?
(A) Adenine
(B) Tyrosine
(C) Guanine
(D) Cytosine
Ans: (B)
5. Biofertilizer
Q. Which of the following professional( s) are more likely to run the risk of a permanent change in their cell’s DNA?
1. Researchers using carbon 14 isotope
2. X-ray technician
3. Coal miner
4. Dyer and painter Select the correct answer by using the codes given below. Code
(A) Only 2
(B) 1, 2 and 3
(C) 1, 2 and 4
(D) 1, 3 and 4
Ans: (A)
Q. Which of the following is a source of biofertilizer?
(A) Yeast
(B) Chlorella
(C) Azolla
(D) Mold
Ans: (C)
Q. Which of the following is a biofertilizer?
(A) Urea
(B) 2,4-D
(C) Streptocycline
(D) Azolla
Ans: (D)
Q. The biofertilizer used as a supplemenatry food for the cattle, especially for milking bovinces is
(A) Azospirillum
(B) Azolla
(C) Azotobacter
(D) Rhizobium
Ans: (B)
Q. Which of these is not correctly matched?
(A) Blue-green algae – Biofertilizer
(B) Chrysopa – Maho-control
(C) Bio 902 – Variety of mustard
(D) Azotobacter – Bioinsecticide
Ans: (D)
Q. Which bacteria is responsible for nitrogen fixation in soyabean?
(A) Rhizobium leguminosarum
(B) Rhizobium japonicum
(C) Rhizobium fajioleai
(D) Rhizobium traitolai
Ans: (B)
Q. 2, 4-D is
(A) An insecticide
(B) An explosive
(C) A fungicide
(D) A herbicide
Ans: (D)
Q. Blue-green algae are chiefly used as biofertilizer in the crop of
(A) Wheat
(B) Gram
(C) Paddy
(D) Mustard
Ans: (C)
Q. Blue-green algae is used to supply nitrogen to
(A) Bajra
(B) Maize
(C) Paddy
(D) Wheat
Ans: (C)
Q. Which one of the following is not correctly matched? Nitrogen fixing Crop agent
(A) Blue-green algae – Paddy
(B) Rhizobium – Pea Leguminisarum
(C) Azotobacter – Wheat
(D) Azolla – Maize
Ans: (D)
Q. Azolla gives a good biofertilizer when mixed with
(A) Blue-green algae
(B) Bone meal
(C) Cow dung
(D) Urea
Ans: (A)
Q. Azolla is often used as biofertilizer because it is associated with
(A) Blue-green algae
(B) Red algae
(C) Fungus
(D) Moss
Ans: (A)
Q. Azolla is
(A) Aquatic Fern
(B) Aquatic algae
(C) Aquatic bacteria
(D) None of the above
Ans: (A)
Q. Aquatic Fern, which is used as a biofertilizer is
(A) Salvinia
(B) Azolla
(C) Marsilia
(D) Pteridium
Ans: (B)
Q. Which of the following microorganisms are used as biofertilizer?
(A) Cyanobacteria
(B) Protozoa
(C) Virus
(D) None of the above
Ans: (A)