Hello Students: DAY- 22 Evening Coffee with NEET

HELLO STUDENTS: DAY- 22 Evening

CRACK THE NEET - BIOLOGY BY A GLANCE IN TEN MINUTES !!!

26.Which  layer is morphologically homologous to the endodermis found in the root ?

= Starch sheath of Dicot stem

27.Which is a protein that prevents blood clotting ,secreted by Mast cells?

= Heparin

28.Which are extra chromosomal,self replicating ds circular DNA molecules ?

= Plasmids

29.Which is a reconstructed plasmid and mostly widely used as cloning vector?

= pBR 322 Plasmid (4361 base pairs are found,p denotes plasmid ,B and R respectively represent the names of scientists BOLIVER and RODRIGUEZ who developed this plasmid)

30.Which are called as "Molecular scissors"?

= Restriction endonucleases ,which are used to cut or cleave or nick the DNA into fragments.

31.Give examples for Exonucleases:

= Bal 31 and Exonuclease III.

32.Give examples for Endonucleases used to break the internal phosphodiester bonds within a DNA molecule:

= Hind II , EcoRI , Pvul, BamHI and TaqI.

33.Which is referred to as "Molecular paste" used to join the cut ends of ds DNA during Genetic Engineering?

= Ligase

34.Who putforth the Ten percent law ?

= Lindeman,in 1942

35.Who was introduced the concept of Ecological pyramids?

= Charles Elton

36.Which is a Blue green algae (Cyanobacteria) commonly used as Single Cell Protein( SCP) in tablet forms?

= Spirulina

37.Which are commonly called as "Stop codons" (or)"Termination codons"(or) Non-sense codons to halt the protein synthesis?

= UAA,UAG and UGA

38.During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point.What is that sequence called?

= TATA box (or) Pribnow box (non - coding DNA sequence) 

39.In which plant , TAYLOR conducted the experiment to prove semiconservative mode of chromosome replication?

= Vicia faba,the Broad bean.

40.Who was first demonstrated Cellular totipotency?

= F.C.Steward

41.Good Ozone and Bad Ozone are found respectively in which layers?

= Stratosphere and Troposphere

42.Which bacterium is a common indicator of water pollution?

= Escherichia coli ( E.coli)

43.Which are most suitable indicators of SO2 pollution in the environment ?

= Lichens

44.Which is a First man- made cereal with hexaploid nature(an allopolyploid)?

= Triticale

45.In which one , Dr Norman Boraug and Dr M.S. Swaminathan are associated ?

= Green revolution

46.Where is International Rice Research Institute (IRRI) is located?

= Los Banks,Philippines

47.Which is referred as " Start codon" (or) "Initiation codon" and it codes for the aminoacid METHIONINE (Met in Eukaryotes and fMet in Prokaryotes)?

= AUG

48.Which are the pyrimidines?

= Cytocine, Thymine (found in DNA) and Uracil( found in RNA)

49.Which is a convoluted membranous structure of plasma membrane found in Prokaryotes like bacteria perform the cellular respiration just like mitochondria in Eukaryotes?

= Mesosome

50.who was coined the term Green Revolution?

= William S.Gaud in 1968.

Mr.R.Soundarapandian, MSc, MEd, MPhil, 

PG Asst Zoology 
SIR MCTM Boys Higher Secondary School, 

Purasawalkam Chennai-84.