Zoology - Online Test
Q1. Correct sequence for the amount of dissolved oxygen in water body is:
Answer : Option A
Explaination / Solution:
Dissolve oxygen in water bodies is utilized by aquatic organisms for respiration. Oligotrophic have least dissolved oxygen followed by mesotrophic and eutropic have highest concentration of dissolved oxygen.
Q2. Which phase of M-stage is called as invisible phase?
Answer : Option D
Explaination / Solution:
S-phase of M-stage is called as invisible phase of cell cycle because during this phase synthesis of DNA takes place which is not visible to the naked eye. There is only imbalance of Nucleoplasmic ratio.
Q3. The nuclease will act on
Answer : Option C
Explaination / Solution:
A nuclease (also archaically known as nucleodepolymerase or polynucleotidase) is an enzyme capable of cleaving the phosphodiester bonds between monomers of nucleic acids. Nucleases variously effect single and double stranded breaks in their target molecules.
There are two primary classifications based on the locus of activity. Exonucleases digest nucleic acids from the ends. Endonucleases act on regions in the middle of target molecules. They are further subcategorized as deoxyribonucleases and ribonucleases. The former acts on DNA, the latter on RNA.
Q4. The epithelial cells of Bowman’s capsule are called:
Answer : Option A
Explaination / Solution:
Podocytes are cells in the Bowman's capsule in the kidneys that wrap around capillaries of the glomerulus. The Bowman's capsule filters the blood, retaining large molecules such as proteins while smaller molecules such as water, salts, and sugars are filtered as the first step in the formation of urine.
Q5. The sequence of origin of life may be considered as
Answer : Option A
Explaination / Solution:
The sequence of origin of life may be as first formation of nucleic acid (DNA and RNA) followed by amino acids to form protein. Chlorophyll evolved in plants to become autotrophic from chemoheterotrophic.
Q6. The Darwin of 20th century is
Answer : Option B
Explaination / Solution:
Born on 5 July 1904, in Kempten, Germany, ERNST MAYR, the Harvard University evolutionary biologist who has been called ‘The Darwin of the 20th century’, was one of the 100 greatest scientists of all time.
Q7. The vertebral formula of human is :
Answer : Option A
Explaination / Solution:
The vertebral column is differentiated into cervical (7), thoracic (12), lumbar (5), sacral (5-fused) and coccygeal (4-fused) regions starting from the skull.
Q8. Gene therapy is used to treat
Answer : Option D
Explaination / Solution:
Gene therapy is used to treat hereditary genetic disorders which involve delivery of normal gene into the individual or embryo to take over the function of non-functional gene.
Q9. The test that are used for diagnosis of AIDS are
Answer : Option C
Explaination / Solution:
The incubation period of AIDS is up to 7 years. It can be detected earlier using the diagnostic tools based on biotechnology. Western blotting test and ELISA are two common tests.
Q10. Epithelium covering in tongue is
Answer : Option C
Explaination / Solution:
Tongue is covered by non-keratinized squamous epithelial tissues having taste buds of different kinds in different regions of tongue.
