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Test: Biology - 3 - UPSC MCQ


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10 Questions MCQ Test - Test: Biology - 3

Test: Biology - 3 for UPSC 2024 is part of UPSC preparation. The Test: Biology - 3 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Biology - 3 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biology - 3 below.
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Test: Biology - 3 - Question 1
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Which part of the brain controls conscious activities such as speech, taste, smell, and hearing?

Detailed Solution for Test: Biology - 3 - Question 1
The grey matter in the brain is responsible for controlling conscious activities such as speech, taste, smell, and hearing. It is the outer part of the cerebrum and plays a key role in intelligence, reasoning, learning, emotions, and other higher functions of the brain.
Test: Biology - 3 - Question 2
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Which division of the nervous system is responsible for controlling involuntary actions like respiration, heart rate, and gland secretion?

Detailed Solution for Test: Biology - 3 - Question 2
The parasympathetic nervous system is a division of the autonomic nervous system and is responsible for controlling involuntary actions such as respiration, heart rate, and gland secretion. It works in opposition to the sympathetic nervous system, promoting relaxation, comfort, and conservation of energy.
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Test: Biology - 3 - Question 3
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What is the largest cell in our body?

Detailed Solution for Test: Biology - 3 - Question 3
The neuron is the largest cell in our body. It is a specialized cell of the nervous system that transmits electrical impulses. Neurons have a unique structure with long projections called dendrites and axons, which allow them to communicate with other cells.
Test: Biology - 3 - Question 4
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What is the process of converting food into energy-giving substances called?
Detailed Solution for Test: Biology - 3 - Question 4
The process of converting food into energy-giving substances is called digestion. It involves the breakdown of complex food molecules into simpler forms that can be absorbed and utilized by the body. Digestion occurs in the digestive system, which includes the alimentary canal and associated digestive glands.
Test: Biology - 3 - Question 5
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Which organ in the human body is responsible for the filtration of waste products from the blood?
Detailed Solution for Test: Biology - 3 - Question 5
The kidneys are the organs in the human body that are responsible for the filtration of waste products from the blood. They play a crucial role in maintaining the body's internal balance by removing waste, excess water, and toxins from the bloodstream, producing urine as a waste product.
Test: Biology - 3 - Question 6
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Which gland in males secretes a fluid that nourishes and provides motility to the sperms?
Detailed Solution for Test: Biology - 3 - Question 6
The seminal vesicles are glands in males that secrete a fluid that nourishes and provides motility to the sperms. This fluid, along with sperm from the testes and secretions from other accessory glands, makes up the seminal fluid, which is ejaculated during sexual intercourse.
Test: Biology - 3 - Question 7
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What is the primary function of the uterus in the female reproductive system?
Detailed Solution for Test: Biology - 3 - Question 7
The primary function of the uterus in the female reproductive system is the implantation and development of the embryo. After fertilization, the embryo implants into the uterine wall and receives nutrients and oxygen from the mother through the placenta. The uterus provides a suitable environment for the growth and development of the fetus.
Test: Biology - 3 - Question 8
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Which type of cell division is involved in the formation of gametes?
Detailed Solution for Test: Biology - 3 - Question 8
The formation of gametes involves a special type of cell division called meiosis. Meiosis consists of two rounds of division, resulting in the formation of four haploid cells (gametes) with half the number of chromosomes as the parent cell. This process ensures genetic diversity in the offspring.
Test: Biology - 3 - Question 9
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What is the function of the cell wall in plant cells?
Detailed Solution for Test: Biology - 3 - Question 9
The cell wall in plant cells serves the function of providing protection and support to the cell. It is a rigid structure composed of cellulose and other polysaccharides, giving plant cells their characteristic shape and preventing them from bursting under osmotic pressure. The cell wall also provides mechanical strength and protection against external stresses.
Test: Biology - 3 - Question 10
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Which type of reproduction involves the formation and fusion of gametes?
Detailed Solution for Test: Biology - 3 - Question 10
Sexual reproduction involves the formation and fusion of gametes, which are specialized cells involved in reproduction. This type of reproduction results in the formation of offspring that are genetically different from their parents. It is the most common form of reproduction in higher organisms.
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