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Green International University12 Questions

Biology MCQs

Practice Biology multiple-choice questions for Green International University competitive exams. Each question includes the correct answer and a short explanation, and past-paper questions are marked so you can revise both repeated and fresh material in one place.

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Stratum corneum
Stratum basale
Dermis
Hypodermis
ExplanationThe stratum basale is the deepest layer of the epidermis, where melanocytes produce melanin to protect the skin from UV radiation.
To regulate body temperature
To produce sweat
To secrete sebum for skin lubrication
To provide structural support to the dermis
ExplanationSebaceous glands secrete sebum, an oily substance that lubricates the skin and hair, helping to maintain the skin's barrier function.
Melanocytes
Merkel cells
Langerhans cells
Fibroblasts
ExplanationMerkel cells are specialized mechanoreceptors located in the stratum basale that respond to light touch and textures.
Regulation of sebum production
Contraction to trap heat
Providing structural support to collagen
Transportation of nutrients to hair follicles
ExplanationThe arrector pili muscle contracts to pull hair upright, creating a layer of trapped air for insulation in cold conditions.
Stratum corneum
Stratum granulosum
Stratum spinosum
Dermis
ExplanationThe stratum spinosum, often called the prickle cell layer, contains numerous layers of keratinocytes that are actively producing keratin.
To produce vitamin D
To provide a large surface area for nutrient exchange between the dermis and epidermis
To store subcutaneous fat
To synthesize elastin fibers
ExplanationDermal papillae increase the surface area of the dermal-epidermal junction, facilitating the diffusion of nutrients and waste.
Keratin
Elastin
Collagen
Hyaluronic acid
ExplanationCollagen is a fibrous protein that provides structural support and high tensile strength to the dermis.
Pigment production
Immune surveillance
Temperature regulation
Oil secretion
ExplanationLangerhans cells are dendritic cells that act as the skin's first line of immune defense by identifying pathogens.
Anagen
Catagen
Telogen
Exogen
ExplanationAnagen is the active growth phase where the follicle is deeply rooted and the hair bulb is fully formed.
Eccrine gland
Apocrine gland
Sebaceous gland
Ceruminous gland
ExplanationSebaceous glands are holocrine glands connected to hair follicles that secrete sebum to lubricate skin and hair.
They anchor cells to the basement membrane
They facilitate the shedding of dead skin cells
They hold neighboring keratinocytes together for structural integrity
They allow for the passage of electrical impulses
ExplanationDesmosomes are intercellular junctions that provide mechanical strength by 'spot-welding' cells together.
Estrogen
Androgen
Thyroxine
Cortisol
ExplanationAndrogens increase the size and secretory activity of sebaceous glands, often leading to acne breakouts.

Frequently Asked Questions

Are these Biology MCQs free?

Yes. Every Biology MCQ on this page is free to practice, including the correct answer and explanation.

Do these include past-paper questions?

Yes — questions sourced from past papers are clearly marked with a "Past Paper" badge, alongside fresh practice questions.

Which exams do these Biology MCQs help with?

They are aimed at Green International University and related Pakistani competitive exams that test Biology.

How should I practice subject-wise MCQs?

Attempt each question first, then reveal the answer and read the explanation. Short, focused sessions on one subject work better than long unstructured reading.

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