Zoology - Online Test
Q1. Absorption of food takes place in stomach as well as intestine but villi are present in intestine only because :
Answer : Option D
Explaination / Solution:
Villi increases the surface area thereby increasing the absorption of food.The villi also contain lymph vessels for absorbing the products of fat-digestion. From the blood stream, the absorbed food is finally delivered to each and every cell of the body. The mucosal walls of the stomach form irregular folds known as rugae.These help in increasing the surface area to volume ratio of the expanding stomach.
Q2. Which one of the following is a matching pair of a drug and its category?
Answer : Option D
Explaination / Solution:
Amphetamines is kind of drug which is used as stimulant. It is a strong CNS stimulant that is used in the treatment of ADHD. Lysergic acid dimethyl amide is not a narcotic and heroin is not a psychotropic agent.
Q3. Find out the mismatched pair :
Answer : Option D
Explaination / Solution:
Different parts of human brain have specializedarea for different receptors. Visual area is located in occipital lobe. General sensory area are located in parietal lobe, smell area is located in frontal area. Speech area is not located in parietal lobe.
Q4. Which one is present nearest to plasmamembrane?
Answer : Option A
Explaination / Solution:
The cell wall of a young plant cell, the primary wallis capable of growth, which gradually diminishes as the cell matures and the secondary wall is formed on the inner (towards membrane) side of the cell.
Q5. Central dogma of protein synthesis is
Answer : Option A
Explaination / Solution:
Central dogma of protein synthesis consists of transcription and translation. In transcription process, DNA is changed into mRNA and in translation step m-RNA produce specific protein.
Q6. The regulatory centres for respiration are located in :
Answer : Option D
Explaination / Solution:
A specialised centre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for this regulation. In the pons region of the brain called pneumotaxic centre can moderate the functions of the respiratory rhythm centre.
Q7. One of the alternate sources of proteins for animal and human nutrition is
Answer : Option A
Explaination / Solution:
Protein requirement for human beings can be fulfilled by single cell protein in which algae like Spiruline is grown on large scale having high protein contents.
Q8.
If the outermost circle in the shown figure indicates manipulative zone of biosphere reserve then 1& 2 represent:
Answer : Option A
Explaination / Solution:
Biosphere reserves are divided into a number of zone. The outer most circle of biosphere represent manipulative zone followed by buffer zone and core zone respectively from outside to inside.
Q9. Which of the following scientists won the nobel prize for discovering second messengers?
Answer : Option D
Explaination / Solution:
Second messengers are molecules that relay signals received at receptors on the cell surface to trigger physiological changes.
The Nobel Prize in Physiology or Medicine 1971 was awarded to Earl W. Sutherland, Jr. "for his discoveries concerning the mechanisms of the action of hormones".
Q10. A fish that has electric organ is
Answer : Option A
Explaination / Solution:
Torpedo fish has electric organ. They are known for being capable of producing an electric discharge ranging from 8 to 220 volts depending on species.
