CBSE 11TH BIOLOGY - Online Test
Q1. The three domains system do not includes
Answer : Option A
Explaination / Solution:
Three kingdom or domain system of classification do not includes viral domain. Virus were discovered after invention of electron microscope so, they were not the part of living world.
Q2.
Read the following statements about CCK :
i. this hormone stimulates gastrointestinal motility and pancreatic endocrine function.
ii. this hormone stimulates release of bile from gall bladder.
Answer : Option D
Explaination / Solution:
Cholecystokinin, previously called pancreozymin, is synthesized and secreted by enteroendocrine cells in the duodenum, the first segment of the small intestine.
Its presence causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively, and also acts as a hunger suppressant.
Q3. Fevicol is a synthetic sticky substance insoluble in water. It is a type of…
Answer : Option C
Explaination / Solution:
Fevicol is a synthetic sticky substance insoluble in water and used for joining wood and paper is a type of resins.
Q4. Plant mitosis is generally controlled by
Answer : Option D
Explaination / Solution:
In plant cell, mitosis cell division is generally controlled by cytokinin hormone. It increase the rate of cell division leading to increased cell production. Auxinis also required for cell division in plant.
Q5. Carolus Linnaeus is associated with
Answer : Option D
Explaination / Solution:
Carolus Linnaeus is associated with Binomial nomenclature in which name of the organism consists of genus name and species name.
Q6. The number of nymphs produced from single ootheca of frog is
Answer : Option A
Explaination / Solution:
Young ones of frogs are called nymphs. When the ootheca ruptures, 16 nymphs come out.
Q7. Identify the cuboidal virus from the following
Answer : Option B
Explaination / Solution:
Virus consists of genetic material (DNA or RNA) surrounded by protein capsules. They are of different shapes and size. Polymyelitis virus is cubical in shape.
Q8. During mitosis ER and nucleolus begin to disappear at
Answer : Option C
Explaination / Solution:
During mitosis ER and nucleolus begin to diappear at late prophase stage indicated the beginning of next phase. It happens due to increased divisional activities of nucleus.
Q9. Which one is a obligate category of classification?
Answer : Option D
Explaination / Solution:
Family is the obligate category of classification as it forms the basic functional unit of classification. Family includes all the related species having similar charecters.
Q10.
Match the following with reference to frog
Column I
a) Medulla oblongata
b) Smell
c) Touch
d) Cranial nerves
Column II
i) Sensory papillae
ii) PNS
iii) Foramen magnum
iv) Nasal epithelium
Answer : Option B
Explaination / Solution:
The medulla oblongata passes out through the foramen magnum and continues into spinal cord, which is enclosed in the vertebral column. Frog has different types of sense organs. This includes organs of touch (sensory papillae) and smell (nasal epithelium). The nervous system is organized into a central nervous system including brain and spinal cord and peripheral nervous system (PNS) including cranial and spinal nerves.
