Biology - Online Test
Q1. Triticum aestivum belong to the family
Answer : Option D
Explaination / Solution:
Triticum aestivum, common or bread wheat, is an annual grass in the Poaceae (grass family) native to the Mediterranean region and southwest Asia.
Q2. Which of the following gibberellic acid is used for malting process in brewing industry?
Answer : Option D
Explaination / Solution:
GA3 is used to speed up the malting process in brewing industry.
Q3. Which one of the following pairs is wrongly matched
Answer : Option D
Explaination / Solution:
Water hyacinth develops offset for vegetative propagation. Its forms large number of branches in very short interval of time to cover the whole water bodies and depriving other aquatic organisms from oxygen dissolved in water.
Q4. Successive transitional communities will show
Answer : Option D
Explaination / Solution:
During ecological succession, transitional communities or seral communities will show increase in the number of species due to addition of nutrient medium at successive stages of succession.
Q5. Read the following statements and view carefully the figure :
i. Osteoporosis is an age-related disorder characterised by decreased bone mass. Osteoarthritis is shown in the following figure.
ii. The above figure shows gouty arthritis which is caused by inflammation of joints.
iii. Decreased levels of estrogen is a common cause for increased chances of fractures.
iv. Inflammation of joints is caused by decreased levels of calcium ions in body fluids.
i. Osteoporosis is an age-related disorder characterised by decreased bone mass. Osteoarthritis is shown in the following figure.
ii. The above figure shows gouty arthritis which is caused by inflammation of joints.
iii. Decreased levels of estrogen is a common cause for increased chances of fractures.
iv. Inflammation of joints is caused by decreased levels of calcium ions in body fluids.
Answer : Option D
Explaination / Solution:
Osteoporosis is an age-related disorder characterised by decreased bone mass. It is mainly caused by decreased level of estrogen in blood. Osteoporosis may leads to increased chances of fracture.
Q6. An MNC exploiting biological resources (turmeric) of other nation without proper authorization will be called as
Answer : Option C
Explaination / Solution:
Exploiting biological resources of other nation without proper authorization from the country or people concerned without compensatory payment is called biopiracy.
Q7. World population day is celebrated on
Answer : Option B
Explaination / Solution:
World population day is celebrated on 11th July every year world over to create awareness about the ill effect of unchecked population explosion.
Q8. 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.
Q9. 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.
Q10. A cell dipped in 0.5 M sucrose has no effect. It is dipped in 0.5 M NaCl, the cell will
Answer : Option A
Explaination / Solution:
A cell dipped in 0.5 M sucrose has no effect due to osmosis as concentration of sucrose is more of equal to cytoplasm but 0.5 M NaCl cause exosmosis that leads to plasmolysis.
