A researcher introduces double-stranded RNA into a culture of mammalian cells and can identify its location or that of its smaller subsections experimentally, using a fluorescent probe. Some time later, she finds that the introduced strand separates into single-stranded RNAs, one of which is degraded. What does this enable the remaining strand to do?

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#Question id: 15655

#SCPH06 I Botany

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. Next you isolate a mutation, designated MelB–, which gives uninducible melibiase activity. Mapping experiments show that MelB– is linked to Mel1. Using an F' factor that carries the chromosomal region surrounding Mel1, you perform the following genetic tests:

 

Describe the proposal for the type of regulatory functions affected by the MelB– mutation.

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#Question id: 18633

#SCPH01 Biochemistry

Phylogenetic tree provides information about 

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#Question id: 2936

#SCPH01 Biochemistry

The stable attachment of sister kinetochores to microtubules emanating from opposite spindle poles is called:

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#Question id: 8703

#SCPH06 I Botany

In a comparison of birds and mammals, having four limbs is ________.

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#Question id: 10512

#SCPH05 I Biotechnology

Members of the Poaceae family, which includes all of the cereal crops, use benzoxazinoids alkaloids are derived from,