We can represent atoms by listing the number of protons, neutrons, and electrons—for example, 2p+, 2n0, 2e- for helium. Which of the following represents the 18O isotope of oxygen?

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#Question id: 19921

#Unit 12. Applied Biology

Which gene from B. amyloliquefaciens was placed under the control of infection-specific promoter prp 1-1 and was transferred into potato.

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#Question id: 18956

#Unit 13. Methods in Biology

It is possible to calculate the number of clones that must be present in a gene library to give a probability of obtaining a particular DNA sequence. This formula is:

 

where N is the number of recombinants, P is the probability and f is the fraction of the genome in one insert. Thus for the E. coli DNA chromosome of 5 × 10 ⁶ bp andan insert size of 20 kb ( f = 0.004), the number of clones needed ( N ) would be 1 × 10 ³ ,with a probability of P will be

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#Question id: 28370

#Unit 5. Developmental Biology

the generation of dorsal/ventral axis in Drosophila, which protein signal causes follicle cells to differentiate into a dorsal axis of embryo?

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#Question id: 12940

#Unit 13. Methods in Biology

 Choose the correct order for the steps involve in Protein engineering.

1. Protein modelling

2. Protein crystallography

3. Site-directed mutations

4. Comparison with entries in databases of known proteins.

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#Question id: 10581

#Unit 10. Ecological Principles

Life-history characteristics associated with K-selected organisms include