Zoology - Online Test
Q1. Alpha lactalbumin present in milk is
Answer : Option A
Explaination / Solution:
The milk produced by transgenic cow contain a protein called alpha lactaalbumin. The milk containing this protein is more suitable for babies as compare to normal cow’s milk.
Q2. Which one the following in not an Intra-uterine device
Answer : Option B
Explaination / Solution:
Vaults is not an intra-uterine device used by females to prevent unwanted pregnancy. It is a barrier method of contraception made of rubber.
Q3. Both WBC and RBC are formed in the
Answer : Option C
Explaination / Solution:
In adults, both WBC and RBC are formed in the bone marrow that is located in long bones such as thighs.
Q4. Who demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants?
Answer : Option A
Explaination / Solution:
Beijerinek is considered one of the founders of virology. In 1898, he published results on the filtration experiments demonstrating that tobacco mosaic disease is caused by an infectious agent smaller than a bacterium and called the fluid as Contagiumvivum fluidum(infectious living fluid).
Q5. Among hydrophytes which of the following xylem component remains absent?
Answer : Option D
Explaination / Solution:
Xylem vessels are responsible of water transportation in plants. Hydrophytes grows in plants therefore there is no requirement of special water transporting tissues in hydrophytes.4
Q6. If an imaginary food contains 5 grams of protein, 4 grams of fat and 10 grams of carbohydrates. Now calculate total calories it would provide ( given 1g protein=4 calories, 1g fat = 10 calories, 1g carbohydrates = 4 calories ) :
Answer : Option B
Explaination / Solution:
Five gram of protein will produce 5 x 4 = 20 calories, 4 g of fat = 4 x 10 = 40 calories and 10 g of carbohydrates = 10 x 4 = 40 calories. So total energy produced is equal to 20 + 40 + 40 = 100 calories.
Q7. Use of anti-histamines and steroids give a quick relief from
Answer : Option B
Explaination / Solution:
Anti-histamines and steroids give a quick relief from allergy. Allergy may be due to allergen like pollen grains, dust or other microbes. Common symptom of allergy is inflammation on skin.
Q8.
Read the following :
i. insects have taste receptors on their feets.
ii. crickets have ears on the legs.
iii. snakes are highly sensitive to air borne sounds.
iv. frogs have colour vision.
Answer : Option D
Explaination / Solution:
Insects have taste receptors on their feets.These receptor are located at different regions to get stimulus more accurately.
Crickets have ears on the legs and frogs have colour vision.
Q9. The ribosomes of a polysome translate
Answer : Option C
Explaination / Solution:
Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. The ribosomes of a polysome translate the mRNA into proteins.
Q10. What is called Griffith effect?
Answer : Option C
Explaination / Solution:
Griffith's experiment, was an experiment done in 1928 by Frederick Griffith. It was one of the first experiments showing that bacteria can get DNA through a process called transformation.
Griffith carried out experiment on mice using pneumonia causing bacteria to show that DNA is the genetic material by transforming non-virulent strain into virulent strain which is called bacterial transformation.
