Welcome to your CHSL 2021 ALL BIOLOGY Questions
What is the mode of adaptation done by aquatic plants and animals where the osmotic concentration of the body fluids changes with that of the ambient air and water osmotic concentration?
Which is a visible sign of severe iodine deficiency?
Identify the cell that is amoeboid in shape.
Which cell theory proved that the quasi-fluid nature of lipid enables lateral movement of proteins within the overall bilayer?
Which level of the food chain includes millipede, springtails, woodlice, dung flies and slugs that feed on the dead or decaying plants or animals?
Which type of carbohydrate CANNOT be broken down by the GI tract, does not provide energy, but helps the body get rid of wastes and keeps the intestinal tract healthy?
Identify the element that helps to trap light energy that is essential for photosynthesis
Which English ecologist was the first to describe the distinctive shape of the food web, which he called the pyramid of numbers?
Under the electron microscope, which cell organelle is visible as either clusters or single, small dots that float freely in the cytoplasm?
Which vitamins are present in Milk?
How do the red algae reproduce vegetatively?
Which red-orange pigment found in plants and fruits, especially carrots and colourful vegetables, acts as a powerful antioxidant that can benefit our brain, skin, lungs, and eye health?
Identify the solution extracted from a plant belonging to division Thallophyta.
Which group of animals has a body wall composed of both circular and longitudinal muscle fibres surrounded by a moist, cellular cuticle that is secreted by an epidermal epithelium?
Which is a perennial carnivorous plant of the sundew family that attracts preys and usually traps insects and then breaks them down with digestive enzymes?
In 2019, which disease,according to WHO,was ranked as the seventh leading cause of death globally?
What do you call the water holding compounds produced in large quantities by marine brown and red algae?
Which structural layer surrounds the algal, fungal and plant cells and provides tensile strength and protection against mechanical and osmotic stress?
Which of the following is a group of primitive vertebrates having a large jawless sucking mouth, no limbs or paired fins and a completely cartilaginous skeleton with a persistent notochord?
Which of the following statements is correct about mitochondria?
Which of the following is NOT a symptom of Beriberi caused due to the deficiency of Vitamin B1?
How is tuberculosis spread in humans?
Identify the component that is unique only to prokaryotes.
Metabolic reactions in our body are carried out by:
In animal cells, which membrane-bound cell organelles are generally smaller and help to separate waste products?
Which ecologist’s research provided revolutionary new insights into how energy and nutrients move through the ecosystems?
Solanum lycopersicum L. is the scientific name of which of the following highly consumed vegetables?
In cell biology, what is a large double-membraned organelle that is sometimes referred to as the ‘central unit’ of the cell because it contains the chromosomes that bear genetic material?
Which of the following is a type of bryophyte that lives in many environments and is characterised by its small, flattened leaves, root-like rhizoids, and peristome?
Identify the component found only in a eukaryotic cell.
Identify the plant that shows adaptation through leaves that are reduced to spines
How is food stored in brown algae?
What is the common name of Parthenium hysterophorus?
Who shared the Nobel Prize in Physiology or Medicine 2005 with Barry J Marshall for the discovery of the Helicobacter pylori bacterium and its role in gastritis and peptic ulcer disease?
Which phylum of the Kingdom Animalia includes animals such as Hydra, Adamsia, Physalia and Corals?
The bodies of the animals of phylum Platyhelminthes show _________ grade organisation.
Which is the tallest self-supporting moss species found in New Zealand that usually grows to a height of 60 cm?
Identify the acid that helps in digestion.
Find the odd one out with respect to animals’ response to abiotic factors.
Which technology uses a combination of a large magnet and radio waves to view organs and structures inside our body?
In 1857, who was the first to experimentally demonstrate that the yeast responsible for making alcohol from sugar, and contaminating microorganisms found in normal air, could sour fermentation?
Which is the major microtubule-organising centre (MTOC) in eukaryotic cells involved in various cellular processes, including sensory reception, locomotion, and embryogenesis?
Which phylum of the plant kingdom consists of vascular plants, leaves (known as fronds), roots and sometimes true stems and entire trunks in tree ferns?
Which biological stain is used in histology and cytology to colour all cell nuclei red?
What is the role of ribosomes of a polysome?
Which membrane-bound organelles, first discovered in 1857, are often referred to as the ‘energy factories’ of the cell because they are responsible for making adenosine triphosphate (ATP), the cell's main energy-carrying molecule?
Oleo gum resin (Asafoetida) can be obtained from:
Choose the correct sequence for central dogma.
Which of the following plants is on the verge of extinction due to insensitivity to our environment?
What components are often called the building blocks of the body that play a vital role in helping to repair and strengthen muscle tissues after exercise?
Why are species of moss used as fuel?
Antonie van Leeuwenhoek was known for which discovery in late 17th century?
Which disease refers to the inflammation of the liver caused by a variety of infectious viruses and non-infectious agents leading to a variety of health problems?
What kind of adaptation is seen in bacteria when they form various kinds of thickwalled spor
Identify the disease that is caused due to inadequate secretion of the hormone insulin from the pancreas?
Which algae produces agar?
Which of the following characters are correct about Phylum Echinodermata?
Which unicellular organism acquires food by a process in which cells absorb external material by engulfing it with the cell membrane?
Philosophiae Naturalis Principia Mathematica, popularly known as Principia, published in 1687, is the great work of which scientist?
Which enzyme is present in saliva?
How do humans acclimatise at high altitudes where atmospheric pressure is low for normal breathing?
Which of the following microscopic cells are of an amoeboid shape with a distinctive central membrane?
Which of the following is an example of active transport?
What is the common name of the members of family Phaeophyceae?
Identify the disease caused by a monkey bite.
Identify the alga that is NOT a marine algae.
Name a common ingredient made from the starchy part of corn kernels used as a thickening agent for gravies, marinades, sauces, soups and casseroles.
In 1972, ________ coined the term ‘pyramid of numbers’ that represented the total numbers of individuals (population) present in each trophic level.
The bacterium flagellum is composed of three major structural elements. Which of the following is NOT one of these elements?
A pyramid of biomass is a diagram that shows the population at each level of the food chain. Accordingly, ________ occupy the base with the highest biomass.
Malaria is a deadly disease caused by parasites that are transmitted to people through the bite of ________.
Which of the following leucoplasts store oil and fat?
Which of the following are the most primitive non-vascular plants?
In the early 1980s, an aspartic acid-containing dipeptide sweetener was discovered, that was about 2000 times sweeter than sucrose. What is the name of that sweetener?
What disease in adults means ‘soft bones’ that usually develops due to a deficiency of vitamin D (often from not getting enough sunlight), or less often, digestive or kidney disease?
Which protein acts like a binder, holding food together and adding a ‘stretch’ property, and is found naturally in some grains, including wheat, barley, and rye?
Which is the toxin-causing bacterium that spoils cream, cheese and milk and makes them taste bitter, sour or bitter?
In 1838, who published an article discussing the structure and origin of plant cells?
Which of the following are non-vascular flowerless plants in the taxonomic division of Bryophyta?
Which of the following serves as the cell's digestive system, serving both to degrade material taken from outside the cell and to digest the undigested components of the cell?
What is a biotechnological process accomplished by yeast, some type of bacteria, or some other microorganism to convert sugar into ethyl alcohol and carbon dioxide?
Which term is used to describe all living communities on earth, including animals, plants, bacteria, fungi and photosynthetic microbes?
What is the name of the zone where trade winds converge?
For what discovery was Jan Evangelista Purkinje known in 1839?
Which vegetable contains a chemical called anthocyanin that turns pink/reddish in the presence of acid, turns purple when neutral and turns blue or green when mixed with alkaline substances?
Which statement is NOT correct regarding the food chain?
In 1869, who named a new term ‘Oecologie’that defined the study of the relationship of organisms with their environment?
Phytoplankton, small sea-dwelling organisms, belong to which trophic level of the food web?
Identify a way that does NOT prevent a non-communicable disease from occurring in someone.
In which year did Rudolf Virchow published an essay titled ‘Cellular Pathology’ in which he famously declared that "every cell arises from another cell”?
In which state is cactus vegetation found in dry areas of Thorny Bushes in the form of spines?
In 1674, who used a single-lens microscope to examine pond water and observed dozens of protists, which he called 'animalcules', as well as spirogyra, or green algae?
Which is a major essential lipophilic (fat-soluble) vitamin required for the protection of cell membranes and the formation of red blood cells (RBCs)?
In 1879, who observed cell division in salamander embryos, where cells divide at fixed intervals?
The body of animals of the phylum Protozoa, such as Paramecium, Amoeba, Euglena, shows ________ grade organisation.
