CBSE
Multiple Choice QuestionsA polygenic inheritance in human beings is
Skin colour
Sickle cell anaemia
Colour blindness
Phenylketonuria
One gene-one enzyme relationship was established for the first time in
Neurospora crassa
Salmonella typhimurium
Escherichia coli
Diplococcus pneumoniae
Nucleic acid segment tagged with a radiactive molecule is called
Clone
Probe
Plasmid
Vector
In 1944, Avery, McCarty and MacLeod isolated substance from heat killed a virulent form of bacteria and added to the non-virulent form of bacteria which changed the non-virulent to virulent from this substance can be destroyed by
DNAse
Protease
Lipase
Amylase
The Okazaki fragments in DNA chain growth
Results in transcription
Polymerise in the 3' to 5' direction and forms replication fork
Prove semi-conservative nature of DNA replication
Polymerise in the 5' to 3' direction and explain 3' to 5 DNA replication
Match the following column I with column II.
| Column I | Column II |
| A. Carcinogen | 1. Cancerous Tumour |
| B. Anaphase -I | 2. Disjunction |
| C. Mitosis | 3. Synapse |
| D. Zygotene | 4. Plectonemic Coiling |
A-1, B-2, C-4, D-3
A-3, B-1, C-4, D-2
A-2, B-3, C-1, D-4
A-4, B-1, C-3, D-2
Which of the following is true regarding the phase lambda, a virus which infects bacteria?
In the lytic cycle, the bacterial host replicates viral DNA, passing it on to daughter cells during binary fission
In the lysogenic cycle, the bacteria-host replicates viral DNA, passing it onto daughter cells during binary fission
In the lytic cycle, viral DNA is integrated into the host genome
In the lysogenic cycle, the host bacterial cell burst, releasing phases
The part of the bacterial chromosomes sharing homology with genome fragment transferred from the recipients to cell during emrozygote formation is known as
Eugenic
Exogenate
Endogenate
Dysgenic
A kind of biotechnology involving manipulation of
DNA is
DNA replication
Genetic engineering
Denaturation
Renaturation
The codon for anticodon 3-UUUA-5' is
3-AAU-5
5-UAAA-3
5-AAAU-3
3-UAAU-5'
