1) Oxygen is not produced during photosynthesis
by
(1) Cycas (2) Nostoc (3) Green sulphur bacteria (4) Chara
Answer (3) Green sulphur bacteria
2. Double fertilization is
(1) Fusion of two male gametes with one
egg
(2) Fusion of one male gamete with two
polar nuclei
(3) Fusion of two male gametes of a
pollen tube with two different eggs
(4) Syngamy and triple fusion
Answer (4) Syngamy and triple fusion
3. Which one of the following plants shows a
very close relationship with a species of moth,
where none of the two can complete its life
cycle without the other?
(1) Banana (2) Yucca (3) Hydrilla (4) Viola
Answer
4. Pollen grains can be stored for several
years in liquid nitrogen having a temperature of
(1) –196°C (2) –80°C (3) –120°C (4) –160°C
Answer (1) –196°C
5. Which of the following elements is
responsible for maintaining turgor in cells?
(1) Potassium (2) Sodium (3) Magnesium (4)
Calcium
Answer (1) Potassium
6. What is the role of NAD+ in cellular respiration?
(1) It is a nucleotide source for ATP
synthesis.
(2) It functions as an electron carrier.
(3) It functions as an enzyme.
(4) It is the final electron acceptor
for anaerobic respiration.
Answer
7. In which of the following forms is iron absorbed by plants?
(1) Free element
(2) Ferrous
(3) Ferric
(4) Both ferric and ferrous
Answer (3) Ferric
8. Which of the following is commonly used as a
vector for introducing a DNA fragment in
human lymphocytes?
(1) phage (2) Ti plasmid (3) Retrovirus (4) pBR 322
Answer (3)
9. Use of bioresources by multinational companies
and organisations without
authorisation from the concerned country and its
people is called
(1) Biodegradation (2) Biopiracy (3) Bio-infringement (4) Bioexploitation
Answer (2) Biopiracy
10. In India, the organisation
responsible for assessing the safety of introducing genetically modified
organisms for public use is
(1) Research Committee on Genetic Manipulation (RCGM)
(2) Council for Scientific and Industrial Research (CSIR)
(3) Indian Council of Medical Research (ICMR)
(4) Genetic Engineering Appraisal Committee (GEAC)
Ans:(4) Genetic Engineering Appraisal Committee (GEAC)(1) Research Committee on Genetic Manipulation (RCGM)
(2) Council for Scientific and Industrial Research (CSIR)
(3) Indian Council of Medical Research (ICMR)
(4) Genetic Engineering Appraisal Committee (GEAC)