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.331 Chromosomes are made up of
A DNA only
B DNA and Proteins
C RNA and Proteins
D DNA and Lipids
Discuss / Board
Q.332 The primary objective of the Human Genome Project was to
A Cure all genetic diseases by 2005
B Sequence the entire three billion base pairs of human DNA
C Create genetically modified humans
D Identify the DNA of all extinct species
Discuss / Board
Q.333 Which of the following is a symptom of Iodine deficiency in the diet
A Night blindness
B Goitre
C Scurvy
D Beriberi
Discuss / Board
Q.334 Identify the correct order of the stages in Mitosis
A Prophase Anaphase Metaphase Telophase
B Prophase Metaphase Anaphase Telophase
C Metaphase Prophase Anaphase Telophase
D Telophase Anaphase Metaphase Prophase
Discuss / Board
Q.335 Statement I Blood pressure is measured with a Sphygmomanometer Statement II Normal systolic blood pressure in a healthy adult is 80 mmHg
A Only Statement I is correct
B Only Statement II is correct
C Both are correct
D Neither is correct
Discuss / Board
Q.336 The total volume of air a person can expire after a maximum inspiration is called
A Tidal Volume
B Vital Capacity
C Residual Volume
D Total Lung Capacity
Discuss / Board
Q.337 Which of the following is a non-reducing sugar
A Glucose
B Fructose
C Sucrose
D Maltose
Discuss / Board
Q.338 The enzyme 'Carbonic Anhydrase' contains which metal ion at its active site
A Iron
B Magnesium
C Zinc
D Copper
Discuss / Board
Q.339 The process of 'Hemodialysis' utilizes the principle of
A Active Transport
B Diffusion
C Phagocytosis
D Coagulation
Discuss / Board
Q.340 Which among the following is not a primary nutrient for plants
A Nitrogen
B Phosphorus
C Potassium
D Iron
Discuss / Board
Q.341 The 'Power House' of the cell is Mitochondria because it is the site of
A Glycerol synthesis
B ATP synthesis
C Protein synthesis
D Lipid synthesis
Discuss / Board
Q.342 Which of the following describes the 'Haldane Effect' in respiratory physiology
A High oxygen concentration promotes the dissociation of carbon dioxide from hemoglobin
B High carbon dioxide concentration promotes the dissociation of oxygen from hemoglobin
C Low pH increases the affinity of hemoglobin for oxygen
D Increased temperature shifts the oxygen-dissociation curve to the left
Discuss / Board
Q.343 In a plant cell the concentration of minerals in the vacuole is higher than in the cytoplasm because of
A Passive diffusion through the tonoplast
B Active transport against the concentration gradient
C Osmosis of water into the vacuole
D Facilitated diffusion through carrier proteins
Discuss / Board
Q.344 Which of the following nitrogenous bases is found in RNA but not in DNA
A Adenine
B Guanine
C Cytosine
D Uracil
Discuss / Board
Q.345 Which specific part of the human kidney is responsible for the 'Counter-Current Mechanism' to concentrate urine
A Proximal Convoluted Tubule
B Loop of Henle and Vasa Recta
C Bowmans Capsule
D Distal Convoluted Tubule
Discuss / Board
Q.346 Which of the following enzymes is used as a 'Biological Scissor' in genetic engineering
A DNA Ligase
B DNA Polymerase
C Restriction Endonuclease
D Reverse Transcriptase
Discuss / Board
Q.347 The 'Dark Reaction' or Calvin Cycle of photosynthesis takes place in which part of the chloroplast
A Grana
B Stroma
C Thylakoid lumen
D Inner membrane
Discuss / Board
Q.348 Which part of the digestive system contains 'Peyers Patches' that provide immunity against intestinal pathogens
A Stomach
B Ileum
C Duodenum
D Oesophagus
Discuss / Board
Q.349 Which of the following is the 'Structural and functional unit' of the human liver
A Nephron
B Hepatocyte
C Hepatic Lobule
D Alveoli
Discuss / Board
Q.350 In the human heart the 'Tricuspid Valve' is located between
A Left atrium and Left ventricle
B Right atrium and Right ventricle
C Left ventricle and Aorta
D Right ventricle and Pulmonary artery
Discuss / Board
Q.351 Which cell organelle is responsible for the 'Packaging and Secretion' of materials in the cell
A Endoplasmic Reticulum
B Golgi Apparatus
C Mitochondria
D Lysosomes
Discuss / Board
Q.352 What is the primary role of 'Surfactant' in the human lungs
A To increase the surface area of alveoli
B To reduce surface tension and prevent alveolar collapse
C To transport oxygen into the capillaries
D To trap dust and bacteria
Discuss / Board
Q.353 The 'Ringworm' infection in humans is caused by
A Virus
B Bacteria
C Fungi
D Nematodes
Discuss / Board
Q.354 In humans the 'Corpus Luteum' is responsible for the secretion of which hormone
A LH
B FSH
C Progesterone
D Prolactin
Discuss / Board
Q.355 Which of the following is a primary lymphoid organ in the human body
A Spleen
B Tonsils
C Thymus
D Lymph nodes
Discuss / Board
Q.356 Which plant tissue is primarily responsible for the 'Secondary Growth' or increase in girth
A Apical Meristem
B Lateral Meristem
C Intercalary Meristem
D Parenchyma
Discuss / Board
Q.357 The movement of ions across the cell membrane through 'Ion Channels' down their electrochemical gradient is called
A Active transport
B Facilitated diffusion
C Endocytosis
D Primary active transport
Discuss / Board
Q.358 The disease 'Diabetes Insipidus' is caused by the deficiency of which hormone
A Insulin
B Glucagon
C Antidiuretic Hormone
D Oxytocin
Discuss / Board
Q.359 Which among the following is a 'Connecting Link' between reptiles and birds
A Platypus
B Archaeopteryx
C Peripatus
D Seymouria
Discuss / Board
Q.360 The 'Rhesus Factor' or Rh blood group system was discovered by
A Karl Landsteiner and Weiner
B Robert Koch
C Louis Pasteur
D William Harvey
Discuss / Board

Master Biology set 1 for All Competitive Exams 2026

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