Zoology - Online Test
Q1. Intestinal mucosa has microvili to
Answer : Option C
Explaination / Solution:
The innermost layer of intestinal wall is called mucosa. Mucosa contain microvilli to increase the surface area for absorption of digested food to transport into different part of the body.
Q2. A bacterium capable of tolerating extreme heat, dryness and toxic chemicals is probably having
Answer : Option C
Explaination / Solution:
A bacterium capable of tolerating extreme heat, dryness and toxic chemicals have ability to produce endospores inside the body that help them to tide over unfavorable conditions.
Q3. The birth rate if 7 new plants are added to previous year plant population of 23 Salvinia plants will be
Answer : Option B
Explaination / Solution:
The birth rate of a population =
Here birth rate=
Hence, birth rate of Salvinia plants is equal to 0.3.
Q4. Select which one is correctly matched pair :
Answer : Option C
Explaination / Solution:
Some of the substances like fructose and some amino acids are absorbed with the help of the carrier ions like sodium ions. This mechanism is called the facilitated transport.
Q5. Which plant is responsible for doing hallucination?
Answer : Option C
Explaination / Solution:
Hallucination is a condition in which a person feels pleasure in spite of stress and other mental problems. In this condition, central nervous systems get influenced and reduce the thinking capacity. Datura, Atropa baladona and erythroxylum coca, all cause hallucination.
Q6. Match the following :
column A
a) Hypophysis
b) Modulator
c) Receptor
d) Effector
column B
i) Sense organs
ii) Pituitary
iii)Brain and spinal cord
iv) Muscles and glands
column A
a) Hypophysis
b) Modulator
c) Receptor
d) Effector
column B
i) Sense organs
ii) Pituitary
iii)Brain and spinal cord
iv) Muscles and glands
Answer : Option D
Explaination / Solution:
Hypophysis is a part of pituitary gland. Modulator is present in brain and spinal cord. Receptor is located in sense organs. Effectors are muscle and glands that bring about movement.
Q7. Chlorophyll is located inside
Answer : Option D
Explaination / Solution:
The chloroplast consists of a number of organised flattened membranous sacs called the thylakoids,Chlorophyll pigments are present in the thylakoids.
Q8. Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?
Answer : Option D
Explaination / Solution:
Lysine, encoded by the codons AAA and AAG, is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group, an α-carboxylic acid group, and a side chain lysyl, classifying it as a charged, aliphatic amino acid.
UUA, AUG and CCC do not code for Valine, cysteine and alanine respectively.
Q9. 70% of carbondioxide is transported as bicarbonate by the enzyme
Answer : Option A
Explaination / Solution:
An enzyme present in red blood cells, carbonic anhydrase, aids in the conversion of carbon dioxide to carbonic acid and bicarbonate ions. When red blood cells reach the lungs, the same enzyme helps to convert the bicarbonate ions back to carbon dioxide, which we breathe out. It transportes nearly 70% of carbondioxide as bicarbonate.
Q10. The maintenance of hives of honeybees for the production of honey is
Answer : Option C
Explaination / Solution:
Maintenance of bee hives of honey bees for production of honey is called apiculture. Apiculture can be practiced in any area having pasture of herbs and flowering plants.
