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TLS Online TPP Program

#Question id: 23629

Mechanical shearing is often the preferred method of fragmenting genomic DNA when constructing a genomic DNA library. Why would this method be preferred over complete digestion with restriction enzymes?

#Unit 13. Methods in Biology
  1. Enzymes might produce fragments that are too small or too large to be cloned.
  2. Enzyme cleavage can interrupt important gene sequences, in which case not all genes may be represented in the library.
  3. Shearing ensures the library contains overlapping fragments of DNA, which makes it possible to perform a chromosome walk.
  4. All of the above
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TLS Online TPP Program

#Question id: 15172

#Unit 2. Cellular Organization

Nitrifying bacteria such as Nitrosomonas and Nitrosospira are soil and aquatic bacteria of considerable ecological significance. They oxidize ammonia to nitrite. They are called as
TLS Online TPP Program

#Question id: 4809

#Unit 8. Inheritance Biology

The upper most following figure above shows the locations of four genes on the genetic map of an organism; the lower figure shows the locations of the same four genes on a physical map derived from the nucleotide sequence of the DNA of that organism. The maps are not identical because
TLS Online TPP Program

#Question id: 28189

#Unit 5. Developmental Biology

When a cell is capable of differentiating autonomously even when placed into another region of the embryo, is an example of
TLS Online TPP Program

#Question id: 3777

#Unit 3. Fundamental Processes

Which of the following types of cells are affected most by telomere shortening?
TLS Online TPP Program

#Question id: 14699

#Unit 13. Methods in Biology

If A and B are arbitrary events, then