A small protein subunit used in a vaccine can fail to stimulate T-cell immunity because of:

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#Question id: 5554

#Unit 5. Developmental Biology

Even in the absence of sperm, metabolic activity in an egg can be artificially activated by ________.

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#Question id: 15360

#Unit 4. Cell Communication and Cell Signaling

The cytochrome P450 constitute a superfamily of heme-containing enzymes that occur in nearly all living organisms, from bacteria to mammals, These monooxygenases, which in animals are embedded in the endoplasmic reticulum membrane, catalyze reactions of the sort

                  RH + O₂ + 2 H⁺ + 2e⁻ → ROH + H₂O 

The electrons (e−) are supplied by NADPH, which passes them to cytochrome P450’s heme prosthetic group via the intermediacy of the enzyme NADPH P450 reductase. Here RH represents a wide variety of usually lipophilic compounds for which the different cytochromes P450 are specific. They include

a. polycyclic aromatic hydrocarbons 

b. polycyclic biphenyls

c. frequently carcinogenic compounds that are present in tobacco smoke, broiled meats, and other pyrolysis products

d. which were widely used in electrical insulators and as plasticizers and are also carcinogenic.

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#Question id: 23628

#Unit 13. Methods in Biology

Which of the following is true concerning genomic libraries?

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#Question id: 14771

#Unit 13. Methods in Biology

What is the chance of throwing a number greater than 4 with an ordinary die whose faces are numbered from 1 to 6 ?

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#Question id: 21388

#Unit 12. Applied Biology

Some chemical treatment show increased plantlet survival at the time of  soil transfer such as;

a) 5-enolpyruvilshikimate phosphate

b) Bromoxynil Nitrilase (bxn)

c) Paclobutrazol

d) Polyethylene glycol (PEG)

e) Glyphosate oxido-reductase (GOX)

Which one of the following are correct?