The OSSSC LSI, Forester, or FG exams and seeking comprehensive preparation in Biology. We’ve compiled a curated list of the top 30 Biology (General Science) multiple-choice questions (MCQs) to aid in your exam readiness. Covering various aspects of biology, these questions delve into fundamental concepts, principles, and terminologies essential for success in your examination. Whether you’re focusing on cell biology, genetics, ecology, or physiology, this collection ensures a well-rounded understanding of the subject matter. With detailed explanations accompanying each answer, you’ll not only assess your knowledge but also enhance your understanding of key biological concepts. So, dive into these MCQs and embark on your journey towards acing the biology section of your OSSSC exams!
Top 30 Biology (General Science) MCQs for OSSSC LSI, Forester, FG
- What is another name for Tocopherol?
[A] Vitamin D
[B] Vitamin E
[C] Vitamin K
[D] Vitamin B
Answer: B [Vitamin E]Notes: Vitamin E, also known as Tocopherol, is a series of organic compounds essential for various bodily functions. - What is Auxin, the plant hormone, primarily?
[A] Weak Organic Acid
[B] Weak Inorganic Acid
[C] Weak Organic Base
[D] Gaseous Compound of Carbon
Answer: A [Weak Organic Acid]Notes: Auxin, a plant hormone, functions as a weak organic acid, promoting cell elongation and other growth processes. - Which unprocessed food contains the highest Vitamin E content?
[A] Wheat germ oil
[B] Rice germ oil
[C] Oat bran oil
[D] Sunflower oil
Answer: A [Wheat germ oil]Notes: Wheat germ oil, extracted from wheat kernels, contains the highest natural concentration of Vitamin E. - What is transported through a pollen tube?
[A] Pollen Grains
[B] Sperm Cells
[C] Eggs
[D] All of them
Answer: B [Sperm Cells]Notes: Pollen tubes facilitate the transport of sperm cells during plant reproduction. - Which disease is caused by Yersinia pestis?
[A] Leprosy
[B] Anthrax
[C] Plague
[D] Dengue
Answer: C [Plague]Notes: Plague, an infectious disease, is caused by the bacterium Yersinia pestis. - Which of the following is a Mollusc?
[A] Cuttlefish
[B] Silverfish
[C] Dogfish
[D] None of the above
Answer: A [Cuttlefish]Notes: Cuttlefish belongs to the mollusk category, specifically the order Sepiida. - In which of the following plant groups is chlorophyll found?
[A] Algae & Ferns
[B] Algae & Mosses
[C] Algae, Ferns & Mosses
[D] None of the above
Answer: C [Algae, Ferns & Mosses]Notes: Chlorophyll, the green pigment essential for photosynthesis, is present in algae, ferns, and mosses. - Which diseases are classified as degenerative diseases?
[A] Heart, Joints, Nervous system
[B] Heart, Joints
[C] Joints only
[D] Heart only
Answer: A [Heart, Joints, Nervous system]Notes: Degenerative diseases involve continuous deterioration of tissues or organs over time, affecting various systems including the heart, joints, and nervous system. - What is the correct definition of Saprophytes?
[A] A parasitic plant that can complete its life cycle independent of a host
[B] A heterotrophic plant that feeds upon other living plants
[C] A heterotrophic plant that feeds upon dead organic matter
[D] A plant that is unable to synthesize a particular organic compound
Answer: C [A heterotrophic plant that feeds upon dead organic matter]Notes: Saprophytes derive nutrition from decaying organic matter, such as dead plants or animals. - “Pratham,” the first animal born in 1990 by IVF, was a ________?
[A] Cow
[B] Buffalo
[C] Sheep
[D] Goat
Answer: B [Buffalo]Notes: Pratham was the first buffalo born through In vitro Fertilization (IVF) in 1990 at the National Dairy Research Institute, Karnal. - What is the subject matter of genetics?
[A] Forms and features of plant parts
[B] Heredity and variations
[C] Disorders of living beings
[D] None of these
Answer: B [Heredity and variations]
Note: Genetics focuses on the study of heredity and variations, playing a central role in biology and overlapping with fields like agriculture, medicine, and biotechnology. - What is Phaeophyceae commonly known as among the following algae?
[A] Green Algae
[B] Brown Algae
[C] Red Algae
[D] Blue Algae
Answer: B [Brown Algae]
Note: Phaeophyceae, commonly known as brown algae, are multicellular algae found mainly in cold waters of the Northern Hemisphere, including many seaweeds. - Which of the following is not an example of Pteridophyta?
[A] Fern
[B] Azolla
[C] Pteridium
[D] Sphagnum
Answer: D [Sphagnum]
Note: Lycopodium, Ferns, Azolla, and Pteridium are examples of Pteridophytes. Sphagnum belongs to Bryophyta. - Which of the following is not a feature of mycoplasma?
[A] Pleomorphic
[B] Lacks cell wall
[C] Both 1 & 2 are correct
[D] Cannot live without oxygen
Answer: D [Cannot live without oxygen]
Note: Mycoplasma is an anaerobic organism that requires oxygen to survive. - Who discovered the ribosome?
[A] George E. Palade
[B] Theodor Boveri
[C] Albert von Kolliker
[D] Robert Brown
Answer: A [George E. Palade]
Note: Ribosomes were discovered by George E. Palade, describing them as small particles attached to the endoplasmic reticulum membrane. - Which is not an exception in angiosperms?
[A] Double fertilization
[B] Secondary growth
[C] Presence of vessels
[D] Autotrophic nutrition
Answer: A [Double fertilization]
Note: Double fertilization is a characteristic of angiosperms where both a diploid zygote and a triploid endosperm are formed. - What structure is responsible for the motility of bacteria?
[A] Pilli
[B] Flagella
[C] Sheath
[D] Capsules
Answer: B [Flagella]
Note: Flagella are responsible for bacterial motility, enabling movement and chemotaxis. - In which group is heteromorphic alternation of generation commonly found?
[A] Algae
[B] Fungi
[C] Bryophyta
[D] All of the above
Answer: C [Bryophyta]
Note: Heteromorphic alternation of generation is common in Bryophytes like mosses, liverworts, and hornworts. - Which is least likely to be found along the beach?
[A] Brown algae
[B] Red algae
[C] Mosses
[D] All of the above
Answer: C [Mosses]
Note: Mosses are usually found in moist or shady places, unlike brown and red algae which are more commonly found along beaches. - What causes Downy mildew disease?
[A] Fungus
[B] Bacteria
[C] Virus
[D] None of these
Answer: A [Fungus]
Note: Downy mildew disease is caused by a fungus. - What are the different stages of aerobic respiration?
[A] Glycolysis
[B] The Krebs cycle
[C] Oxidative phosphorylation
[D] All of the above
Correct Answer: D [All of the above]
Notes: There are three phases of aerobic cellular respiration: glycolysis, the Krebs cycle, and oxidative phosphorylation. - Which of the following are the features of Monocotyledons?
[A] leaves are simples and the veins are parallel
[B] seeds have a single cotyledon
[C] closed vascular bundles and large in number
[D] All of the above
Correct Answer: D [All of the above]
Notes: The features of Monocotyledons are: leaves are simple and the veins are parallel, seeds have a single cotyledon, the group contains adventitious roots and closed vascular bundles and large in number. - The grass is an example of which root?
[A] Nodulose Roots
[B] Moniliform Roots
[C] Annulated Roots
[D] Prop Roots
Correct Answer: B [Moniliform Roots]
Notes: Moniliform roots are swollen and compressed. The grass is an example of Moniliform Roots. - Which of these carry water into a leaf?
[A] Leaf blade
[B] Veins
[C] Chlorophyll
[D] Roots
Correct Answer: B [Veins]
Notes: Veins carry water into a leaf. The veins in leaves are made up of two major tissues xylem and phloem. - What is the name of a plant disease in which there is fine webbing on the underside of the leaves?
[A] Spider Mites
[B] Anthracnose
[C] Mealybugs
[D] Rhizoctonia
Correct Answer: A [Spider Mites]
Notes: Spider Mites is the name of a plant disease in which there is fine webbing on the underside of the leaves. - Flame cells are the excretory structures for__.
[A] Annelida
[B] Coelenterates
[C] Platyhelminthes
[D] Echinodermata
Correct Answer: C [Platyhelminthes]
Notes: Flame cells are the excretory structures for Platyhelminthes. Platyhelminthes are best described as flatworms, triploblastic, acoelomate animals. - Ornithorhynchus is a __.
[A] A fossil bird
[B] Duck
[C] Monotreme mammal
[D] Dinosaur
Correct Answer: C [Monotreme mammal]
Notes: Ornithorhynchus is also called duck-billed platypus. Ornithorhynchus is an example of a Monotreme mammal. - A microscopic gap between a pair of adjacent neurons over which nerve impulses pass when going from one neuron to the next is called __.
[A] Neurotransmitter
[B] Synapse
[C] Axon
[D] None of the above
Correct Answer: B [Synapse]
Notes: A microscopic gap between a pair of adjacent neurons over which nerve impulses pass when going from one neuron to the next is called Synapse. Synapses connect neurons in the brain to the rest of the body and those neurons to muscles. - The condition related to Myopia is:
[A] Monocular vision
[B] Unable to see the nearer object clearly
[C] Unable to see the distant object clearly
[D] None of the above
Correct Answer: C [Unable to see the distant object clearly]
Notes: The condition related to Myopia is unable to see the distant object clearly. Myopia is a common vision condition. In this, you can see clearly the objects near you, but the distant objects are blurry. - The splice of the joints are fibrous in nature in which there is no movement?
[A] tendons and tibia
[B] ligaments and femur
[C] diarthrosis
[D] synarthroses
Correct Answer: D [synarthroses]
