Free Cell and General Physiology MCQs with Answers

• A. Stensons duct
• B. Naso lacrimal duct
• C. common bile duct
• D. maxillary Sinus

Explanation: The valve of Hasner is the distal mucosal fold at the opening of the nasolacrimal duct into the inferior meatus of the nose.

• A. That the cell is resting
• B. nothing
• C. that the cell is active
• D. that the cell is in transition phase

Explanation: An open-faced or euchromatic nucleus contains relatively dispersed chromatin, allowing active transcription.

• A. Thymine
• B. Cytosine
• C. Guanine
• D. Uracil

Explanation: In DNA, adenine pairs specifically with thymine through two hydrogen bonds, while guanine pairs with cytosine.

• A. RNA contains ribose
• B. DNA carries the information in all organizations
• C. DNA is localized in nucleus
• D. RNA does not contain thymine

Explanation: DNA is the stable repository of hereditary information in cellular organisms, whereas RNA mainly helps express that information through…

• A. Extracellular fluid
• B. Plasma
• C. Intracellular fluid
• D. Whole blood

Explanation: Intracellular fluid forms about two-thirds of total body water, whereas extracellular fluid forms about one-third.

• A. Nucleo protein
• B. Chromo protein
• C. Phospho protein
• D. Simple protein

Explanation: Albumin is a simple protein because hydrolysis yields only amino acids, unlike conjugated proteins such as phosphoproteins and…

• A. Colloid osmotic pressure
• B. Total osmotic pressure
• C. Chloride ion concentrations
• D. Potassium ion concentrations

Explanation: Intracellular fluid and interstitial fluid are both electrically neutral and have nearly equal total osmotic pressure, which prevents…

• A. Anchoring junctions
• B. Tight junctions
• C. Gap junctions
• D. Focal junctions

Explanation: Gap junctions form intercellular channels that allow ions and small cytoplasmic molecules to pass directly between adjacent cells.

• A. Postural position
• B. Covering of the body
• C. Peripheral vasoconstriction
• D. all of the above

Explanation: Thermoregulation uses behavioural and autonomic mechanisms: posture and body covering alter heat loss, while peripheral vasoconstriction…

• A. extracellular sodium concentration
• B. Intracellular potassium concentration
• C. Magnitude of the stimulus
• D. resting membrane potential

Explanation: The action-potential overshoot depends mainly on the sodium equilibrium potential, so it varies with the extracellular sodium…

• A. Sweating
• B. Decrease heat production
• C. Vasodilatation
• D. Non- shivering thermogenesis

Explanation: Cutaneous vasodilatation is the earliest response to heat because it increases blood flow to the skin and promotes heat loss; sweating…