Biology set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 605 questions
Q.391 The 'Hypothalamus' serves as the link between the nervous system and the endocrine system through the
A Adrenal gland
B Pituitary gland
C Thyroid gland
D Pancreas
Discuss / Board
Q.392 Which of the following describes 'Biodiversity Hotspots'
A Regions with low species richness but high human population
B Regions with very high species richness and high degree of endemism
C Areas where only common species are found
D Pristine areas with no human interference
Discuss / Board
Q.393 In humans the 'Pacinian Corpuscles' are receptors for
A Pain
B Pressure
C Heat
D Cold
Discuss / Board
Q.394 Which process in the plant cell is known as 'Cellular Drinking'
A Phagocytosis
B Pinocytosis
C Exocytosis
D Plasmolysis
Discuss / Board
Q.395 The 'Middle Lamella' which holds neighboring plant cells together is mainly composed of
A Cellulose
B Hemicellulose
C Calcium Pectate
D Lignin
Discuss / Board
Q.396 The term 'Biomagnification' is most commonly associated with which of the following pollutants
A Carbon Monoxide
B DDT
C Sulfur Dioxide
D Nitrogen Gas
Discuss / Board
Q.397 Which of the following is 'NOT' a lymphoid tissue
A Spleen
B Thymus
C Pancreas
D Tonsils
Discuss / Board
Q.398 In the human circulatory system 'Double Circulation' involves
A Blood flowing through the heart twice for every complete circuit
B Two separate hearts in the body
C Blood flowing through the lungs twice
D The use of two aortas
Discuss / Board
Q.399 Which among the following is a symptom of 'Rickets'
A Poor blood clotting
B Soft and deformed bones
C Gums bleeding
D Inability to differentiate colors
Discuss / Board
Q.400 The 'Plasmolysis' in a plant cell occurs when it is placed in a
A Hypotonic solution
B Hypertonic solution
C Isotonic solution
D Pure water
Discuss / Board
Q.401 Which of the following organisms shows 'Metagenesis' or alternation of generations
A Hydra
B Obelia
C Aurelia
D Adamsia
Discuss / Board
Q.402 What is the function of the 'Tapetum' in an angiosperm flower
A To protect the young bud
B To provide nourishment to the developing pollen grains
C To attract insects for pollination
D To help in the dehiscence of the anther
Discuss / Board
Q.403 Which gas is primarily responsible for the 'Greenhouse Effect' on Earth
A Oxygen
B Nitrogen
C Carbon Dioxide
D Argon
Discuss / Board
Q.404 The 'Hormone' secreted by the heart to reduce blood pressure is
A ADH
B ANF
C Aldosterone
D Renin
Discuss / Board
Q.405 The enzyme 'Enolase' requires which cofactor for its activity during glycolysis
A Fe2+
B Mg2+
C Cu2+
D Zn2+
Discuss / Board
Q.406 Which of the following is 'NOT' a characteristic of a Prokaryotic cell
A Presence of 70S Ribosomes
B Lack of nuclear membrane
C Presence of membrane-bound organelles
D Presence of circular DNA
Discuss / Board
Q.407 The 'WBC' that is most abundant in human blood and is primarily phagocytic is
A Basophils
B Eosinophils
C Lymphocytes
D Neutrophils
Discuss / Board
Q.408 In the human ear 'Otoliths' or ear stones are found in which part
A Cochlea
B Semicircular canals
C Utricle and Saccule
D Malleus and Incus
Discuss / Board
Q.409 The 'Symbiotic' relationship between Algae and Fungi is found in
A Mycorrhiza
B Lichens
C Legumes
D Corals
Discuss / Board
Q.410 Which of the following is the 'Fastest' conducting tissue in the human heart
A AV node
B SA node
C Purkinje fibers
D Bundle of His
Discuss / Board
Q.411 Which of the following plant hormones is a 'Gas'
A Auxin
B Ethylene
C Gibberellin
D Cytokinin
Discuss / Board
Q.412 The 'Kyoto Protocol' 1997 is an international agreement to
A Protect migratory species
B Reduce greenhouse gas emissions
C Phase out ozone-depleting substances
D Combat desertification
Discuss / Board
Q.413 Which part of the human eye is sensitive to 'Color' vision
A Rods
B Cones
C Sclera
D Cornea
Discuss / Board
Q.414 Identify the incorrect statement about 'Active Transport'
A It occurs against the concentration gradient
B It requires metabolic energy (ATP)
C It always involves a carrier protein
D It occurs from higher to lower concentration
Discuss / Board
Q.415 The 'Sinus Rhythm' of the heart is determined by the
A AV node
B SA node
C Purkinje system
D Brainstem
Discuss / Board
Q.416 In the human digestive system the absorption of 'Fat-soluble' vitamins occurs mainly in the
A Stomach
B Large intestine
C Small intestine
D Liver
Discuss / Board
Q.417 The 'Turner Syndrome' in humans is caused by
A Trisomy of chromosome 21
B Monosomy of X chromosome (45, X0)
C Extra X chromosome in males (47, XXY)
D Trisomy of chromosome 18
Discuss / Board
Q.418 Which of the following describes the function of 'Dendrites' in a neuron
A To transmit signals away from the cell body
B To receive signals from other neurons and conduct them to the cell body
C To insulate the axon
D To release neurotransmitters into the synapse
Discuss / Board
Q.419 In the process of 'Photosynthesis' the light reactions take place in the
A Stroma
B Thylakoid membranes
C Outer membrane
D Cytoplasm
Discuss / Board
Q.420 The primary antibody found in 'Colostrum' (initial mother's milk) is
A IgG
B IgM
C IgA
D IgE
Discuss / Board

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