Biology - Online Test
Q1. Operon concept was given by
Answer : Option D
Explaination / Solution:
Jacob and Monod (1961) gave the concept of Operon model to explain the gene regulation in prokaryotes using simple experiments to grow E. coli in petriplates containing histidine, lactose or lactose and glucose in the medium.
Q2. Chloroplast stroma contains
Answer : Option D
Explaination / Solution:
Chloroplast contains stroma and grana. Stroma are involved in light independent reaction enzymes for synthesis of glucose molecules using proudcut of light reaction.
Q3. Loud snoring and labored breathing are symptoms of :
Answer : Option B
Explaination / Solution:
Loud snoring and labored breathing are the symptoms of obstructive sleep apnea. Obstructive sleep apnea is a sleep disorder in which breathing is briefly and repeatedly interrupted.
Q4. The entire collections of plants/seeds having all diverse alleles for all the genes of a crop is called
Answer : Option B
Explaination / Solution:
The entire collections of plants, seeds, plant parts having all diverse alleles for all the genes of a crop is called germplasm collections. Different parts of plants are kept at different temperature.
Q5. CES stands for:
Answer : Option A
Explaination / Solution:
CES The Centre for Ecological Sciences, founded in 1983 with the support of the Ministry of Environment and Forests offers exciting opportunities for research in a variety of areas in ecology.
Q6. Glucose will be lost in the urine of patients suffering from :
Answer : Option C
Explaination / Solution:
Glucose will be lost in the urine of patients suffering from diabetes mellitus. It a chronic lifelong condition that affects our body ability to use the energy found in blood.
Q7. Which among the following is monoecious?
Answer : Option D
Explaination / Solution:
Earthworms and leeches are monoecious,contain both male and female reproductive organs in same individual.
Q8. In which part of sperm, mitochondria are present?
Answer : Option B
Explaination / Solution:
Mitochondria are called power-house of the cell. Sperms need energy for active movement. Middle piece of sperm contain large number of mitochondria.
Q9. The nucleic acids that behave like enzymes are called as
Answer : Option C
Explaination / Solution:
Almost all enzymes are proteins. There are some nucleic acids that behave like enzymes. These are called ribozymes.
Q10. Sex determination in human being is
Answer : Option D
Explaination / Solution:
In human beings, a pair of X chromosome is found in female and presence of an X and Y chromosome are determinant of male characteristic.
