Doctors use stethoscope to hear the sounds produced during each cardiac cycle.The second sound is heard when:
Options
(a) Ventricular wall vibrate due to gushing in of blood from atria (b) Semilunar valves […]
Blood pressure in the mammalian aorta is maximum during :
Options
(a) Diastole of the right ventricle (b) Systole of the left ventricle (c) Diastole of the right atrium (d) Systole of the […]
Which one of the following is not applicable to RNA?
Options
(a) 5′ phosphoryl and 3′ hydroxylends (b) Heterocyclic nitrogenous bases (c) Chargaff’s rule (d) Complementary base pairing
Correct Answer:
Chargaff’s rule
Explanation: […]
Which is the most common mechanism of genetic variation in the population of sexually reproducing organism?
Options
(a) Chromosomal aberrations (b) Genetic drift (c) Recombination (d) Transduction
Correct Answer:
Recombination
Explanation:
The most common […]
The wings of a bird and the wings of an insect are :
Options
(a) analogous structures and represent convergent evolution (b) phylogenetic structures and represent divergent evolution (c) homologous structures and represent […]
The term ‘linkage’ was coined by:
Options
(a) T. Boveri (b) G. Mendel (c) W. Sutton (d) T.H. Morgan
Correct Answer:
T.H. Morgan
Explanation:
No explanation available. Be the first to write the […]
The movement of a gene from one linkage group to another is called :
Options
(a) Duplication (b) Translocation (c) Crossing over (d) Inversion
Correct Answer:
Translocation
Explanation:
In translocation, the movement of a […]
The chromosomes in which centromere is situated close to one end are:
Options
(a) Acrocentric (b) Telocentric (c) Sub-metacentric (d) Metacentric
Correct Answer:
Acrocentric
Explanation:
In acrocentric choromosomes, one arm is very short but […]
Multiple alleles are present :
Options
(a) At different loci on the same chromosome (b) At the same locus of the chromosome (c) On non-sister chromatids (d) On different chromosomes
Correct Answer:
At […]
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
Options
(a) X- linked recessive (b) Autosomal recessive (c) X-linked dominant (d) Autosomal dominant
Correct […]
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