Zoology - Online Test
Q1. DNA and RNA resemble each other in possessing
Answer : Option B
Explaination / Solution:
Both DNA and RNA consists of polymers of nucleotides. RNA is single stranded but DNA is double stranded. DNA polynucleotide contains thymine but RNA polynucleotide contains uracil.
Q2. Which of the following microbes cannot be grown into nutritive media?
Answer : Option B
Explaination / Solution:
Virus cannot be grown into nutritive medium because it lacks all cellular apparatus required for reproduction. It reproduces using cellular apparatus of host cell.
Q3. Primary constituents of photochemical smog are
Answer : Option A
Explaination / Solution:
Photochemical smog is a mixture of air pollutants which have been chemically altered into further noxious compounds by exposure to sunlight. The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone, and PAN (peroxyacytyl nitrate).The smog causes poor visibility on roads and airports.
Q4. In some lower plants and social insects, the haploid cells are divide by
Answer : Option C
Explaination / Solution:
Mitosis is called equational division. Since the parent cells are haploi so mitosis will lead to restoration of chromosome number in haploid cells.
Q5. In pBr322, B and R stands for
Answer : Option C
Explaination / Solution:
Plasmid vector Pbr322 is a multipurpose cloning vector. In pBr322, B and R stand for Boliver and Rodriguez who discovered this cloning vector.
Q6. Which one of the followings is also called Sewall Wright Effect?
Answer : Option D
Explaination / Solution:
Sewall Wright was the chief developer of the mathematical theory of genetic drift, which is sometimes known as the Sewall Wright effect, cumulative stochastic changes in gene frequencies that arise from random births, deaths, and Mendelian segregations in reproduction.
Q7. Identify from the following, category which has real existence
Answer : Option C
Explaination / Solution:
Kingdom is a category which has real existence. All the living organisms are divided into 5 kingdoms that exist naturally. Phylum, genus, species etc. is thename given to a group of organisms having some common traits.
Q8. We can save those water reservoirs which are useful for irrigation, by
Answer : Option B
Explaination / Solution:
We can save water reservoirs which are useful for irrigation by checking biotic succession. Biotic succession leads to silt formation at bottom that reduce the capacity of water reservoirs.
Q9. Radioactive probe can be detected by
Answer : Option A
Explaination / Solution:
Radioactive probes are single stranded DNA or RNA having radioactive components. This probe can be detected in the individual by using autoradiography technique.
Q10. Medical termination of pregnancy is considered safe up to _________ of pregnancy.
Answer : Option A
Explaination / Solution:
Medical termination of pregnancy is considered safe up to twelve weeks or three months. At the end of three months all organs of foetus are formed. It is fetal to mother in case of MTP after three months.
