Question
Caffeine, amphetamines and cocaine are
✓
Answer
c
(c) These drugs stimulate the nervous system, make a person more wakeful, alert and active and cause excitement.
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Why do human beings face difficulty to breath in high elevations?
Consider the following statements.
i. In microinjection method, foreign DNA is directly injected into the nucleus of animal cell or plant cell by using microneedles or micropipettes.
ii. Microinjection method is used in oocytes, eggs, and embryo.
iii. Electroporation is the formation of temporary pores in the plasma membrane of host cell by using lysozyme or calcium chloride.
iv. In chemical mediated gene transfer method, certain chemicals such as $Ca ^2+$ help foreign DNA to enter the host cell.
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→i. In microinjection method, foreign DNA is directly injected into the nucleus of animal cell or plant cell by using microneedles or micropipettes.
ii. Microinjection method is used in oocytes, eggs, and embryo.
iii. Electroporation is the formation of temporary pores in the plasma membrane of host cell by using lysozyme or calcium chloride.
iv. In chemical mediated gene transfer method, certain chemicals such as $Ca ^2+$ help foreign DNA to enter the host cell.
Which of the statements given above are correct?
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