Zoology - Online Test
Q1. In yeast, during fermentation the glycolysis pathway leads to
Answer : Option B
Explaination / Solution:
Yeast cells obtain energy under anaerobic conditions using a very similar process called alcoholic fermentation.
Glycolysis is the chemical breakdown of glucose to lactic acid. Alcoholic fermentation is identical to glycolysis except for the final step.
In alcoholic fermentation, pyruvic acid is broken down into ethanol and carbon dioxide.
Q2. Lymph will transport :
Answer : Option C
Explaination / Solution:
Fats are absorbed through lymph in the lacteals present in the intestinal villi.
Q3. Vinegar is obtained from molasses with the help of
Answer : Option C
Explaination / Solution:
Vinegar is chemically diluted acetic acid which is produced by fermentation of molasses in presence of yeast and Acetobactor.
Q4. Which of the following is a line source of air pollution?
Answer : Option B
Explaination / Solution:
A line source, as opposed to a point source, area source, or volume source, is a source of air, noise, water contamination or electromagnetic radiation that emanates from a linear (one-dimensional) geometry.
A smoking person while walking is line source of air pollution as the smoke released by smoking person spread in linear direction.
Q5. In which stage, the cells remain metabolically active but do not proliferate?
Answer : Option C
Explaination / Solution:
In Go stage the cells are in a metabolically active state but do not divide unless there are some abnormal genes which reverses the same. This stage is also called quiscent stage. Examples human nerve cells.
Q6. Lysozyme kills bacteria by destroying
Answer : Option D
Explaination / Solution:
Lysozyme is capable of breaking the chemical bonds in the outer cell wall of the bacteria. Bacterial cell walls contain a layer of peptidoglycan, which is the specific site that lysozyme targets.
The peptidoglycan layer contains alternating molecules called N-acetylglucosamine and N-acetylmuramic acid. These molecules form a strong glycan chain that act as the backbone for the cell wall.
The link between the N-acetylglucosamine and N-acetylmuramic acid is cleaved by lysozyme. Once this chain is broken by lysozyme, it results in bacterial death.
Q7.
In the human kidney :
i. outer zone is called medulla and inner zone is called cortex.
ii.cortex extends between medullary pyramidsas renal columns of Bellini.
Answer : Option C
Explaination / Solution:
Inside the kidney, there are two zones, an outer cortex and an inner medulla. The cortex extends in between the medullary pyramids as renal columns called columns of Bertini.
Q8. Evidences of evolutionary relationship are found in ______.
Answer : Option C
Explaination / Solution:
Evidence of evolutionary relationship are found in fossils in different way. Some fossils act as connecting link between two species. Fossils are found at different depth in earth crust that give evidence of existence of different period of time.
Q9. Living things differ from non-living things in a manner that
Answer : Option C
Explaination / Solution:
The cellular level organisation of the body is the defining feature of life forms or living things. Hence, the correct option is Living things have different level of organisation.
Q10. Polymerisation of actin monomers involves ATP hydrolysis as shown in the following figure : [choose the correct one]
Answer : Option C
Explaination / Solution:
Each ‘F’ actin is a polymer of monomeric ‘G’ (Globular) actins.
