Biology - Online Test
Q1. Rate of fluorescence in a titer plate in ELISA is
Answer : Option C
Explaination / Solution:
The rate of fluorescence in a titer plate in ELISA is directly proportional to antigens present in the sample. This indicates presence of pathogen in the sample also.
Q2. In India, medical termination of pregnancy was legalized in ------.
Answer : Option A
Explaination / Solution:
MTP (Medical termination of pregnancy) was legalized in 1971 in India with exception of female feticides after sex determination using Ultrasonography or other means.
Q3. In frog, during aestivation and hibernation gaseous exchange takes place through
Answer : Option C
Explaination / Solution:
As the frog becomes inactive during aestivation and hibernation, gaseous exchange does not take place through lungs. It takes place through skin.
Q4. The name virus was given by
Answer : Option B
Explaination / Solution:
The name virus that means venom or poisonous fluid was given by Pasteur. They are inert outside specific host and living inside the host cell. Viruses are obligate parasites.
Q5. Special structures found on margins and tips of leaves made of parenchyma tissue and water pores through which guttation take place.
Answer : Option D
Explaination / Solution:
A hydathode is a type of secretory tissue in leaves, commonly found in angiosperms, that secretes water through pores in the epidermis or leaf margin, typically at the tip of a marginal tooth or serration.
Q6. Assertion: Ovule develops into mature seeds and ovary develops into fruits.
Reason: The fruits that develop only from ovary are called true fruits.
Reason: The fruits that develop only from ovary are called true fruits.
Answer : Option A
Explaination / Solution:
Ovule develops to form seeds and mature ovary develops into fruits. The fruits that develop only from ovary are called true fruits and those who contain other parts of flower are called false fruits.
Q7. Negative acceleration phase is caused due to
Answer : Option B
Explaination / Solution:
Negative acceleration phase is caused due to increase in environmental resistance. An environment have limited amount of resources after reaching climax phase negative acceleration occurs.
Q8. Element present in middle lamella
Answer : Option C
Explaination / Solution:
Calcium is required by meristematic and differentiating tissues. During cell division it is used in the synthesis of cell wall, particularly as calcium pectate in the middle lamella.
Q9. Bacteria responsible for chronic gastritis is :
Answer : Option D
Explaination / Solution:
Chronic gastritis involves swelling or inflammation of the stomach lining. Helicobacter pylori colonizes the stomach and induces chronic gastritis, a long-lasting inflammation of the stomach.
Q10. Ovary develops into fruit which develops a thick protective wall called
Answer : Option C
Explaination / Solution:
After fertilisation ovule changes into seeds and ovary itself change into fruits. The outer hard integuments of ovary form protective layer of fruit called pericarp followed by mesocarp and endocarp.
