Free living nitrogen fixing takes place as shown in the following;

             TYPE                                                                                       N-FIXING GENERA

A) Cyanobacteria (blue-green algae)                                        i) Bacillus

B) Aerobic                                                                                     ii) Clostridium

C) Facultative                                                                              iii) Anabaena

D) Anaerobic nonphotosynthetic                                            iv) Rhodospirillum

E) Anaerobic photosynthetic                                                     v) Azospirillum

 Which of the following combination of free living nitrogen fixing bacteria is correct?

TLS Online TPP Program

#Question id: 3663

#Unit 3. Fundamental Processes

_______________ is a specific RNase which cuts RNA–DNA hybrids; involved in replication of ColE1-like plasmids.

TLS Online TPP Program

#Question id: 3664

#Unit 3. Fundamental Processes

 If a mutation is complemented by a clone of a different gene whose product is being overproduced, this is called:

TLS Online TPP Program

#Question id: 3665

#Unit 3. Fundamental Processes

Which of the following is true for Tandem-duplication mutations?

TLS Online TPP Program

#Question id: 3666

#Unit 3. Fundamental Processes

RNA-directed RNA polymerase, used in replication of some RNA viruses termed as:

TLS Online TPP Program

#Question id: 3667

#Unit 3. Fundamental Processes

In an ______________ plasmid, replication occurs in two stages. In the first stage, the double stranded circular plasmid DNA replicates to form another double-stranded circular DNA and a single-stranded circular DNA, In the second stage, the complementary strand is synthesized on the single-stranded DNA to make another double-stranded DNA.

TLS Online TPP Program

#Question id: 3668

#Unit 3. Fundamental Processes

In most plasmids, the genes for proteins required for replication are located very close to the ______________ at which their gene are transcribed.