What is the main advantage of using Yeast Artificial Chromosome based vector over other vectors?

1. It has ability to clone very large fragments of DNA.

2. YAC vectors do not contain origin of replication sites 

3. It has insert  range up to 2000 kb.

4. It help in genome mapping and sequencing projects.

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#Question id: 1629

#Section 2: General Biology

Clonal selection occurs when antigen is encountered by:

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#Question id: 1630

#Section 2: General Biology

Which of the following statements is TRUE of plasma cells?

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#Question id: 1631

#Section 2: General Biology

Specific antibodies are readily detectable in serum following primary contact with antigen after:

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#Question id: 1632

#Section 2: General Biology

A single plasma cell secretes:

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#Question id: 1633

#Section 2: General Biology

Immunological memory can be transferred experimentally by:

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#Question id: 1634

#Section 2: General Biology

What is the main reason an experimental animal treated with X-rays can act as a living test tube for lymphocyte transfer experiments?