Which one of the following sensors is used to measure the movement of the nearby objects?

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#Question id: 19045

#Unit 13. Methods in Biology

The process of passing a mobile phase through a chromatography column is called which one of the following?

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#Question id: 10417

#Unit 6. System Physiology – Plant

Red and far-red lights are perceived by plants through various photoreceptors including phytochromes. What is the effect of red light in a variety of higher and lower plants?

a) It promotes germination and growth

b) It promotes de-etiolation

c) promotes internode elongation and flowering

d) It promotes the production of anthocyanin

e) Inhibits orientation of chloroplasts to directional dim light

Which of the following statements of effect of red light is incorrect?

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#Question id: 10951

#Unit 7. System Physiology – Animal

Which blood type is depicted in the following figure?

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#Question id: 15638

#Unit 13. Methods in Biology

You have isolated two mutations that show decreased expression of the Lac operon. However, unlike like the promoter mutations, these mutations don’t respond to the inducer IPTG. These mutations, designated Lac3– and Lac4–, are evaluated for the quantity of ß-galactosidase and permease activity expressed with or without IPTG:

 

Mapping experiments reveal that Lac3– and Lac4– are different short deletions located in the region before the start of the LacZ gene. Given the data shown above suggest which genetic element(s) in addition to part of the promoter has been deleted in each mutant. 

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#Question id: 79

#Unit 1. Molecules and their Interaction Relevant to Biology

The structure of D-arabinose is shown below. How many stereoisomers are possible for this molecule?