Which of these components is/are not present in Gram negative bacteria?
Teichoic acid
Pseudomurein
Lipopolysaccharide
Mycolic acid
Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?
It is highly expanded in interphase
It stains densely with basic dyes
It is highly condensed in interphase
It stains densely with acidic dyes
B.
It stains densely with basic dyes
C.
It is highly condensed in interphase
Heterochromatin is a tightly packed from of DNA, that stains intensely. Both centromeres and telomeres are heterochromatic. Heterochromatic telomeres remains condensed during interphase where as 'euchromatin" decondenses during interphase. DNA is acidic in nature and therefore stains basic dyes. Loosely coiled chromatin (euchromatin) stainslightly with basic dyes whereas tightly coiled DNA (heterochromatin) stains darkly with basic dyes.
Which of the followings is/are correct for the inheritance of genes involved in human 'ABO' blood grouping?
It is inherited by complete dominant allele
It is inherited by complete recessive allele
It is inherited by codominant allele
It is inherited by single gene with more than two alleles
Antelope cervicapra is
a mammal
commonly known as black back
an animal under data deficient category of wildlife
a threatened Indian wildlife
A set of genes will be in a complete linkage when the progeny phenotypes for parental (P) and recombinant (R) types are
P = 0%, R =100%
P = 50%, R = 50%
P < 50%, R > 50%
P = 100%, R = 0%
Which one of the following statements is wrong in relation to transgenic Bt cotton plant?
Crop yield loss due to the attack by Bacillus thuringiensis bacterium is reduced
Crop yield loss due to the attack by lepidopteran insect pests is reduced
The use of chemical insecticides in the cotton field is minimised
Better quality cotton is produced
Which one of the following natural polymers is found both in insects and fungi?
Pectin
Chitin
Cellulose
Suberin
Third stage larva of Wuchereria bancrofti carried by Gulex mosquito is called
cysticercus
merozoite
microfilariae
trophozoite
Persons suffering from sickle-cell anaemia normally do not suffer from
cholera
malaria
high blood pressure
hepatitis
Two related but geographically isolated species are known as
sibling species
sympatric species
taxonomic species
allopatric species