Practice Biology set 4 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) In class of Amphibia, respiration occurs through
(a)
(b)
(c)
(d)
Q-2) The long bones are hollow and connected by air passages these are characteristics of
(a)
(b)
(c)
(d)
Hollow bones are characteristic adaptive features of birds. It reduces their body weight and is a major flight adaptation.
Q-3) Which of the following group of animals maintains high and constant body temperature such as mammals ?
(a)
(b)
(c)
(d)
Animals which maintain high and constant body temperature are called warm blooded animals. They are also called homeothermic animals. Birds are the first vertebrate to have warm blood. They are homeothermous.
Q-4) A plant having seeds but lacking flowers and fruits belongs to
(a)
(b)
(c)
(d)
Gymnosperms are vascular land plants having naked ovules i.e., ovules are not enclosed in a ovary hence, flower is absent. Ovules after fertilization produces naked seeds. Pteridophytes (ferns) and mosses do not produce seeds.
Q-5) Consider the following statements : - Genomics is the study of the sequencing the genomes of organisms.
- Genomics includes intensive efforts to determine the entire DNA sequence of organisms and fine scale genetic mapping efforts.
- Genomics was established by Fredrick Sangerwhen he first sequenced the complete genomes of a virus and a mitochondrion.
Which of the statements given above are correct about genomics?
(a)
(b)
(c)
(d)
Q-6) Consider the following statements : - Allosomes, are chromosome which are responsible for determination of sex, e.g., X and Y-chromosomes.
- Autosomes, are chromosomes, which determine the somatic characters.
Which of the statement(s) given above is/are true?
(a)
(b)
(c)
(d)
Autosomes determine somatic characters and are present in humans as 21 pairs while sex chromosomes or allosomes are X and Y chromosomes are present as 2 pairs.
Q-7) The factors which represent the contrasting pairs of characters are called
(a)
(b)
(c)
(d)
Q-8) Consider the following statements : - A colourblind person cannot distinguish between red and green.
- Colour blindness is related with a defect in cone cells.
hich of the statements given above is/are correct?
(a)
(b)
(c)
(d)
In colour blindness there is no actual blindness but there is a deficiency of colour vision. The most usual cause is a fault in the development of one or more sets of retinal cones that perceive colour in light and transmit that information to the optic nerve.
Q-9) Match List-I with List-II :
List-I
List-II
A. Theory of mutation
1. Beadle and Tatum
B. Theory of evolution
2. Jacob and Monod
C. One gene one enzyme hypothesis
3. Darwin
D. Operon concept
4. Hugo De Vries
Select the correct answer from the codes given below the lists: (A) (B) (C) (D)
| List-I | List-II |
| A. Theory of mutation | 1. Beadle and Tatum |
| B. Theory of evolution | 2. Jacob and Monod |
| C. One gene one enzyme hypothesis | 3. Darwin |
| D. Operon concept | 4. Hugo De Vries |
(a)
(b)
(c)
(d)
Q-10) In case of incomplete dominance the monohybrid ratio of phenotypes in F2 generation is
(a)
(b)
(c)
(d)