Cyclobutane pyrimidine dimers are formed by -------------from adjacent pyrimidines on one strand by cyclization of the double-bonded C5 and C6carbon atoms of each base to give a cyclobutane ring.

#Question id: 2943

#Part-A Aptitude & General Biotechnology

Which of the following is NOT a mechanism by which G1/S cyclin-CDKs ensure progression through the cell cycle?

#Question id: 2936

#Part-A Aptitude & General Biotechnology

The stable attachment of sister kinetochores to microtubules emanating from opposite spindle poles is called:

#Question id: 18696

#Part-A Aptitude & General Biotechnology

#Question id: 882

#Part-A Aptitude & General Biotechnology

Choose correct statements about thermophilic proteins

I. The proteins found in thermophilic species are much more stable than their mesophilic counterparts.

II. All thermostable proteins have such a high incidence of salt bridges

III. the most important of which are an increased size of the protein’s hydrophobic core, an increased size of the interface between its domains and/or subunits, and a more tightly packed core as evidenced by a reduced surface-to-volume ratio.

IV. Several of these thermostable enzymes have a superabundance of salt bridges on their surfaces.

#Question id: 4742

#Part-A Aptitude & General Biotechnology

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?