MCQ Bank

The average blood volume in an adult human body is about 5 to 6 liters. It varies depending on body size, age, and gender, but 6L is the closest option.

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Where does food pass through between the mouth and the stomach?

A) The small intestine
B) The large intestine
C) The rectum
D) The gullet

AI Explanation

The gullet, also called the esophagus, is the tube that carries food from the mouth to the stomach. It connects the throat to the stomach during digestion.

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Which of the following help in exchange of Oxygen in Blood cells?

A) Albumin
B) Hemoglobin
C) Globulin
D) Fibrinogen

AI Explanation

Hemoglobin is a protein in red blood cells that binds with oxygen and transports it throughout the body. It is essential for oxygen exchange in blood cells.

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Humans are ……… i.e., they eat plants (vegetables) and meat (chicken, beef).

A) Decomposers
B) Herbivore
C) Carnivores
D) Omnivores

AI Explanation

Humans are omnivores because they consume both plant-based foods and animal products. This diet includes vegetables, fruits, meat, and other food sources.

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Which one of the following is smallest unit of lungs?

A) Brochioles
B) Alveoli
C) Bronchi
D) Nephron

AI Explanation

Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs. They are the smallest functional units of the lungs responsible for gas exchange.

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Water from the undigested food is absorbed mainly in the

A) Stomach
B) Food pipe
C) Large intestine
D) Small intestine

AI Explanation

The large intestine is responsible for absorbing water and salts from undigested food material. This process helps form solid waste before elimination from the body.

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Left ventricle pushes blood towards ………

A) Heart
B) Lungs
C) Aorta
D) Tricuspid vale

AI Explanation

The left ventricle pumps oxygen-rich blood into the aorta, which distributes it to the rest of the body. It is the largest artery in the human body.

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Gaseous exchange takes place in plants by stomata in -----cells

A) Mesophil Cells
B) Epithelial cells
C) Vasscular cells
D) Guard cells

AI Explanation

Stomata are tiny pores on plant surfaces controlled by guard cells. These cells regulate gas exchange and water loss in plants.

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Filamentous algal species include

A) Chlamydomonas
B) Euglena
C) Volvox
D) Spirogyra

AI Explanation

Spirogyra is a filamentous green alga made up of long chains of cells. Chlamydomonas, Euglena, and Volvox are unicellular or colonial algae rather than filamentous.

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Phycobilins are found in

A) Blue Algae
B) Brown Algae
C) Red Algae
D) Green Algae

AI Explanation

Phycobilins are accessory pigments found mainly in red algae and cyanobacteria. They help absorb light energy for photosynthesis, especially in deeper water environments.

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Q10

Bread molds belong to phylum

A) Basidiomycota
B) Zygomycota
C) Deuteromycota
D) Ascomycota

AI Explanation

Bread molds, such as Rhizopus, belong to the phylum Zygomycota. They reproduce through the formation of zygospores during sexual reproduction.

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Q11

Which of these are exclusively marine animals?

A) Echinoderms
B) Arthropods
C) Flat worms
D) Mollusks

AI Explanation

Echinoderms, including starfish and sea urchins, are exclusively marine animals. Other groups like arthropods and mollusks include both marine and non-marine species.

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Q12

Stinging cells are found in

A) Arthropods
B) Mollusks
C) Coelentrates
D) Sponges

AI Explanation

Coelenterates (Cnidarians) possess specialized stinging cells called cnidocytes. These cells help in capturing prey and defense.

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Q13

Frogs are included in

A) Decomposer
B) Primary consumers
C) Tertiary consumers
D) Secondary consumers

AI Explanation

Frogs are generally considered secondary consumers because they feed on primary consumers such as insects. They occupy a higher level in the food chain as predators.

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Q14

Interactions between biotic populations and abiotic factors in a community

A) Population
B) Community
C) Ecosystem
D) Biosphere

AI Explanation

An ecosystem includes interactions between biotic components (living organisms) and abiotic factors (non-living elements) in an environment. It describes the flow of energy and cycling of materials among these components.

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Q15

The removal of the metabolic wastes of an organism is

A) Defecation
B) Renal artery
C) Respiration
D) Excretion

AI Explanation

Excretion is the process of removing metabolic wastes such as urea, carbon dioxide, and excess water from an organism. It helps maintain internal balance and prevents waste accumulation.

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Q16

Bowman's capsule plays role in_____.

A) Filtration of Blood
B) All of the mentioned
C) Exchange of gases in blood
D) Transport of Oxygen

AI Explanation

Bowman's capsule is a part of the nephron in the kidney and helps filter blood during urine formation. It collects the filtrate produced by the glomerulus.