Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?
Options
(a) 5’…..CGTTCG…..3′ 3’…..ATGGTA…..5′ (b) 5’…..GATATG…..3′ 3’…..CTACTA…..5′ (c) 5’…..GAATTC…..3′ 3’…..CTTAAG…..5′ […]
Some of the characteristics of Bt cotton are:
Options
(a) long fibre and resistance to aphids (b) medium yield, long fibre and resistance to beetle pests (c) high yield and production of toxic […]
Genetic engineering has been successfully used for producing:
Options
(a) transgenic mice for testing safety of polio vaccine before use in humans (b) transgenic models for studying new treatments for certain cardiac diseases […]
A renewable exhaustible natural resource is:
Options
(a) coal (b) petroleum (c) minerals (d) forest
Correct Answer:
forest
Explanation:
Exhaustible resources are those natural resources that are likely to be exhausted due to […]
Which one of the following is an example of Ex situ conservation?
Options
(a) Wildlife sanctuary (b) Seed bank (c) Sacred groves (d) National park
Correct Answer:
Seed bank
Explanation:
No explanation available. Be […]
The two gases making highest relative contribution to the greenhouse gases are
Options
(a) CO2 and CH4 (b) CH4 and N2O (c) CFC5 and N2O (d) CO2 and N2O
Correct Answer:
CO2 and […]
Which one of the following is one of the characteristics of a biological community?
Options
(a) Stratification (b) Natality (c) Mortality (d) Sex ratio
Correct Answer:
Stratification
Explanation:
No explanation available. Be the […]
The biomass available for consumption by the herbivores and the decomposers is called:
Options
(a) net primary productivity (b) secondary productivity (c) standing crop (d) gross primary productivity
Correct Answer:
net primary productivity
Explanation: […]
In which one of the following molecules the central atom does not have sp³ hybridization?
Options
(a) NH₄⁺ (b) CH₄ (c) SF₄ (d) BF₄⁻
Correct Answer:
SF₄
Explanation:
NH₄⁺, CH₄, BF₄⁻ : sp³ […]
The correct order of the decreasing ionic radii among the following isoelectronic species are :
Options
(a) Ca²⁺ > K⁺ > S²⁻ > Cl⁻ (b) Cl⁻ > S²⁻ >Ca²⁺ > K⁺ (c) S²⁻ […]
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