Recent questions in Biology

What is SDS and its use?

asked Apr 3, 2014 by pady_1

0 answers

What is REBASE ?

asked Apr 3, 2014 by pady_1

0 answers

In its polyadenylated form, RNAI is highly unstable and is therefore unable to prevent formation of ______ (RNAII) , the primer for plasmid DNA synthesis.

asked Apr 3, 2014 by pady_1

0 answers

E. coli used as hosts for colEl plasmids carry a wild-type version of a gene known as ------ which codes for poly(A) polymerase.

asked Apr 3, 2014 by pady_1

0 answers

plasmid vectors which carry the origin of DNA replication from the genome of a single-stranded filamentous bacteriophage such as M13 or f1 are called

asked Apr 3, 2014 by pady_1

0 answers

Insertional inactivation is not possible with pUC vectors, which carry only one antibiotic resistance gene that is -

asked Apr 3, 2014 by pady_1

0 answers

At the origin of replication, synthesis of plasmid DNA depends on the formation of which persistent complex?

asked Apr 3, 2014 by pady_1

1 answer

The plasmids which replicate under stringent control require ongoing synthesis of which protein for replication ?

asked Apr 3, 2014 by pady_1

0 answers

When the bacterial cells are exposed to chloramphenicol, then the content of which DNA increases ?

asked Apr 3, 2014 by pady_1

0 answers

Plasmids, which replicate in a "relaxed" control, continue to duplicate , (a) when protein synthesis is inhibited by amino acid starvation or by (b) addition of an antibiotic such as chloramphenicol.

asked Apr 3, 2014 by pady_1

0 answers

Protein synthesis is required for (a) initiation of each round of host DNA synthesis but (b)not for plasmid replication.

asked Apr 3, 2014 by pady_1

0 answers

Plasmid pSC101 are said to replicate under -

asked Apr 3, 2014 by pady_1

1 answer

X-gal substrate is also known as -

asked Apr 3, 2014 by pady_1

0 answers

When X -gal is included in the agar medium, colonies carrying (a) parental non recombinant plasmids become deep blue, whereas (b) recombinant plasmids remain an ordinary creamy white or become tinted in pale egg-shell

asked Apr 3, 2014 by pady_1

1 answer

Bacterial colonies containing non recombinant plasmids are able to hydrolyze non fermentable, chromogenic substrates called as -

asked Apr 3, 2014 by pady_1

0 answers

When a segment of foreign DNA is cloned into the multiple cloning site of pUC vectors, the sequence encoding the amino-terminal fragment is disrupted. Thus, Bacterial colonies containing recombinant plasmids inhibit-

asked Apr 3, 2014 by pady_1

0 answers

pUC vectors and many of their derivatives carry a short segment of E.coli DNA that contains the regulatory sequences of the lacZ gene which codes for

asked Apr 3, 2014 by pady_1

0 answers

Which plasmid vector has polycloning site consists of a tandem array of unique cleavage sites for 13 restriction enzymes: HindIIl, Spill, Pstl, SaiL Acd, HitlelI, Xiln!, BmnHI, Sma!, Xmal, Kpl1I, Sad, and EcoRl ?

asked Apr 3, 2014 by pady_1

1 answer

The first generation plasmid namely pBR322 has two selectable markers are -

asked Apr 3, 2014 by pady_1

1 answer

The first plasmid used as cloning vector was:

asked Apr 3, 2014 by pady_1

1 answer

Which genetic unit of plasmid is defined as the smallest piece of plasmid DNA that is able to replicate autonomously and maintain normal copy number

asked Apr 3, 2014 by pady_1

0 answers

The word "Plasmid" was described as an extra chromosomal genetic element which was introduced by :

asked Apr 3, 2014 by pady_1

1 answer

Which the given genetic terms refers to, a gene that masks the expression of the other ?

asked Apr 3, 2014 by pady_1

0 answers

Which of the following is highly soluble in water and solvated entirely by hydrogen bonding ?

asked Apr 3, 2014 by pady_1

0 answers

Which of the following is the site of transcriptionally inactive DNA ?

asked Apr 3, 2014 by pady_1

0 answers

Which of the following is the site of synthesis of (or codes for) histone mRNA ?

asked Apr 3, 2014 by pady_1

1 answer

During cytokinesis in plant cells, the cell plate is formed by the fusion of vesicles derived from which of the following ?

asked Apr 3, 2014 by pady_1

1 answer

Which of the following occurs as a result of epinephrine binding to its receptors ?

asked Apr 3, 2014 by pady_1

1 answer

Which of the following is not required for Rec-A dependent recombination between two DNA molecules ?

asked Apr 3, 2014 by pady_1

0 answers

Which of the following are found only in organisms containing polycistronic mRNA ?

asked Apr 3, 2014 by pady_1

1 answer

Which of the following is most likely mechanism for the origin of multigene families ?

asked Apr 3, 2014 by pady_1

1 answer

Temparate bacteriophages differ from other bacteriophages because temperate bacteriophages can

asked Apr 3, 2014 by pady_1

1 answer

Which of the following pairs of compounds are interconvertible in the liver by a single polypeptide chain containing two different catalytic sites ?

asked Apr 3, 2014 by pady_1

1 answer

Actin filaments and microtubules share all of the following properties except

asked Apr 3, 2014 by pady_1

1 answer

the specialized structures located at the ends of eukaryotic chromosomes are called

asked Apr 3, 2014 by pady_1

1 answer

Which of the following is not involved in the processing of mRNA precursors in eukaryotic cells ?

asked Apr 3, 2014 by pady_1

1 answer

Which of the following properties is common to all cytoskeletal motor proteins (such as kinesins, myosins and dyneins) ?

asked Apr 3, 2014 by pady_1

1 answer

Which of the following is an advantage of confocal microscopy over conventional fluorescence microscopy ?

asked Apr 3, 2014 by pady_1

0 answers

The rate limiting step of fatty acid synthesis is catalyzed by

asked Apr 3, 2014 by pady_1

1 answer

In which of the following process, type-B cyclin proteins are not required ?

asked Apr 3, 2014 by pady_1

1 answer

Heat shock proteins are also known to act as

asked Apr 3, 2014 by pady_1

1 answer

All of the following compounds are capable of forming hydrogen bonds with water except

asked Apr 3, 2014 by pady_1

1 answer

Undifferentiated mass of of parenchyma cells derived from plant tissues or explants is called

asked Apr 3, 2014 by pady_1

1 answer

The technique used by scientists, Guha and Maheswari to culture haploid plantlets was experimented on which plant species ?

asked Apr 3, 2014 by pady_1

0 answers

Which plant tissue culture technique is used to generate haploid plantlets ?

asked Apr 3, 2014 by pady_1

1 answer

6-benzylaminopurine (BAP) belongs to which class of plant growth regulators or hormones ?

asked Apr 3, 2014 by pady_1

1 answer

The culture of unfertilized ovary that develops into a gynogenic plants refer to

asked Apr 3, 2014 by pady_1

1 answer

MS, B5, N6, Nitsch and Whites media are example of

asked Apr 3, 2014 by pady_1

1 answer

In micropropagation, the term hardening refers to

asked Apr 3, 2014 by pady_1

1 answer

Indole-3-acetic acid (IAA) belongs to which class of plant growth regulators or hormones ?

asked Apr 3, 2014 by pady_1

0 answers

Ask Questions, Get Answers