Learning Mode - Zoology

Zoology

The interval between the first and second meiotic divisions is known as:

A. Interkinesis
B. Karyokinesis
C. Interphase
D. Diakinesis

Chromosomal DNA is duplicated during:

A. G1 sub stage
B. G2 sub stage
C. S sub stage
D. Metaphase

The ratio of fruit colour of the offsprings in a cross between wwYY and Wwyy will be:

A. 9 white : 2 yellow : 1 green
B. 3 white : 1 green
C. 9 white : 6 yellow : 1 green
D. 1 white : 1 yellow

What will be the ratio of fruit colour of the offsprings in a cross between WwYy and:

A. 12 white : 3 yellow : 1 green
B. 9 white : 2 yellow : 1 green
C. 6 white : 1 yellow : 1 green
D. 2 white : 1 yellow : 1 green

In Duroc Jersey hogs, the coat colour is dependent on two pairs of alleles R and r, and S and s. Any genotype containing at least one R-gene and at least one S-gene results in red coat colour. The double recessive genotype results in white coat colour. All other genotypes results in sandy coat colour. If two hogs (each heterozygous for both pairs of genes) are mated, what kind of offspring will be produced and in what ratio?

A. Red 3 : white 1
B. Red 6 : sandy 3 : white 1
C. Red 13 : white 3
D. Red 9 : sandy 6 : white 1

Assume that in human beings brown eyes (B) are dominant over blue-eyes (b) and right-handedness (L) is dominant over left-handedness (l). A brown eyed, right handed man marries a blue-eyed right handed woman and their first child is blue-eyed and left-handed. What are the genotype of the father and mother, respectively?

A. BBLL and bbLl
B. BbLL and bbll
C. BbLl and bbLl
D. BBLl and bbLl

The ratio of comb types in a cross between r/r, p/p × R/r, P/P will be:

A. 3/4th walnut and 1/4th rose comb
B. 3/4th rose comb and 1/4th single comb
C. Walnut and rose comb in equal proportion
D. Walnut and pea comb in equal proportion

The ratios of comb types in a cross between R/r, P/p × R/R, p/p will be:

A. Walnut and rose comb in equal proportions
B. Walnut and pea comb in equal proportion
C. All four types will appear in equal proportions
D. All the offsprings will have rose comb

The ratios of comb types that would be expected in a cross between R/r, P/p × R/R, P/P is:

A. Walnut and rose comb in equal proportion
B. Walnut and pea comb in equal proportion
C. All four types will appear in equal proportion
D. All the offsprings will have walnut comb

No cell is known to be without:

A. A well defined nucleus
B. Chloroplast
C. Ribosome
D. Mitochondria

Endoplasmic reticulum is the centre of:

A. Excretion
B. Carbohydrate synthesis
C. Protein synthesis
D. Blood formation

The pattern of inheritance of white eye colour in Drosophila shows that the gene is:

A. Located on the X chromosome
B. Located on the Y chromosome
C. Located on an autosome
D. Sex-linked

In DNA, Guanine is 20% Thiamine content is:

A. 60%
B. 20%
C. 40%
D. 30%

Viral chromosomes are made up of:

A. DNA
B. RNA
C. Both DNA and RNA
D. Either DNA or RNA

Nucleolus is formed by:

A. Nuclear membrane
B. Centrosomes
C. Endoplasmic reticulum
D. Chromosomes

Nucleolus was discovered by:

A. Van Benden
B. Fontana
C. Kessel
D. Boveri

In which of the following cytoplasmic organelles may one find DNA?

A. Ribosome
B. Golgi complex
C. Centrosome
D. Mitochondria

ATP synthetase oxidase enzyme is situated in the ________ of mitochondria:

A. Outer membrane
B. Outer chamber
C. Inner membrane
D. Inner chamber

The structure and appearance of ribosome are dependent upon the amount of:

A. Magnesium
B. Potassium
C. Sodium
D. H+ion

The two subunits of a 70S ribosome are:

A. 30S and 50S
B. 30S and 40S
C. 40S and 50S
D. 50S and 20S

RNA contains the following sugar:

A. Ribose
B. Hexose
C. Pentose
D. Fructose

Which one of the following plays an important role in spindle formation during cell division?

A. Centriole
B. Nucleolus
C. Centromere
D. All of these

In the exocrine cells of pancreas, the golgi complex secretes:

A. Zymogens
B. Proteins
C. Prethyroglobulin
D. None of these

In the plasma cells of blood, the golgi complex secretes:

A. Mucopolysaccharides
B. Steroids
C. Zymogens
D. Immunoglobulin's

Glycogenolysis is performed by:

A. Smooth endoplasmic reticulum
B. Lysosome
C. Mitochondria
D. Golgi complex