Answer the following statements true (T) or false (F)

1. Restriction enzymes bind to specific sequences of DNA to seal them together.
2. Most plasmids used in biotechnology contain a selectable marker such as an antibiotic-resistance (ampR) gene.
3. A DNA library is known as a genomic library when it is derived from mRNA.
4. If a large protein is run on a gel slab and subjected to electrophoresis, one would expect to find its band towards the top of the gel.


1. FALSE
2. TRUE
3. FALSE
4. FALSE

Biology & Microbiology

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The cyclic carbon fixation reactions are also known as the  

A.  Krebs cycle. B.  Calvin cycle. C.  citric acid cycle. D.  tri carboxylic acid cycle.

Biology & Microbiology

Which of the following statements describes proteobacteria?

a. Gram-negative and includes the purple bacteria b. Gram-negative and includes the green bacteria c. Gram-positive and includes the purple bacteria d. Gram-positive and includes the green bacteria e. Gran-neutral and includes the green bacteria

Biology & Microbiology

Differentiate between the following terms: threatened species, endangered species, and extinct species. What will be an ideal response?

Biology & Microbiology

The artificial selection of different breeds of dogs is an example of speciation.

a. true b. false

Biology & Microbiology