All Free Biology MCQs with Answers

• A. Solid
• B. Semisolid
• C. Fluid
• D. Liquid

Explanation: The model suggests that phospholipids are able to diffuse in their layers and the proteins of the membrane appear to give a mosaic…

• A. Active transport
• B. Passive transport
• C. Osmosis
• D. Diffusion

Explanation: Active transport is a mode of cellular transport that requires energy to move molecules or ions against their concentration gradient, from…

• A. Spondylosis
• B. Arthritis
• C. Sciatica
• D. Osteoporosis
• E. Rickets

Explanation: Explanation for this question will be added soon.

• A. Rheumatoid Arthritis
• B. Osteoarthritis
• C. Gouty arthritis
• D. Osteomyelitis

Explanation: The correct answer is osteomyelitis. Osteomyelitis is an infection of the bone, not an inflammatory arthritis.

• A. Bed rest
• B. Exercise
• C. Cast
• D. None of these

Explanation: Osteoarthritis (OA) is the most common form of arthritis. Some people call it degenerative joint disease or "wear and tear" arthritis.

• A. Hypertonic
• B. Hypotonic
• C. Isotonic
• D. Heterotonic

Explanation: In isotonic conditions, water potential is the same as in cell sap, solute concentration is also the same as in cell sap.

• A. Less water leaves the cell than enters it, so the cell shrinks.
• B. More water enters the cell than leaves it, so the cell swells and bursts.
• C. Water enters the cells and none leaves it, so the cell swells and bursts.
• D. Water enters the cell and more leaves it, so the cell shrinks.

Explanation: b) More water enters the cell than leaves it, so the cell swells and bursts:This option is partially correct.

• A. Surface tension
• B. Polarity
• C. Heat capacity
• D. Viscosity

Explanation: Water is a good solvent because of its polarity and ability to form hydrogen bonds.

• A. 7.45 to 7.55
• B. 7.35 to 7.45
• C. 7.15 to 7.25
• D. 7.25 to 7.35

Explanation: Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually the body maintains the pH of blood close to 7.40.

• A. Solvent property
• B. Heat capacity
• C. Ionization
• D. Protection

Explanation: Water can absorb and retain heat, which helps stabilize the temperature in living organisms.

• A. Specific Heat Capacity
• B. Hydrogen Bonding
• C. Cohesion and Adhesion
• D. Hydrophobic exclusion

Explanation: If you place a few drops of oil on the surface of a water solution, the oil drops will tend to coalesce (to unite into one whole) into a…

• A. Heat of vaporization
• B. Hydrogen bonding
• C. High polarity
• D. Cohesion and adhesion

Explanation: Water is called the "universal solvent" because it dissolves more substances than any other liquid.

• A. Dipole nature
• B. High specific heat of vaporization
• C. High specific heat capacity
• D. Its liquid state

Explanation: Due to high specific heat capacity, water does not heat up easily and does not loose heat easily, as a result the temperature remains…

• A. Inositides
• B. Lipoproteins
• C. Liposomes
• D. Drugoles

Explanation: Liposomes are lipid vesicles that are used as a drug delivery system. They are made up of a phospholipid bilayer and can encapsulate both…

• A. Pluripotent stem cells
• B. Blood stem cells
• C. Cord blood stem cells
• D. Both a and b

Explanation: The umbilical cord is a flexible cord-like structure that connects a developing fetus to the placenta in the mother's womb.

• A. Chickenpox
• B. Smallpox
• C. Avian pox
• D. Cowpox

Explanation: Edward Jenner inoculated humans with cowpox pus. The basis for vaccination began in 1796 when the English doctor Edward Jenner noticed…

• A. 10-15 degrees
• B. 25-30 degrees
• C. 25-35 degrees
• D. 25-40 degrees

Explanation: Ethanol is prepared industrially by a process called fermentation, which occurs in the presence of certain enzymes and under optimum…

• A. Transduction
• B. Transformation
• C. Binary fission
• D. Conjugation

Explanation: Option B is correct since the transformation is the process of transmitting genetic information from one bacterium to another bacterium…

• A. HBV
• B. HAV
• C. HCV
• D. Options A and B are correct

Explanation: Option (d) suggests that both the Hepatitis B virus (HBV) and the Hepatitis A virus (HAV) have genetically engineered vaccines available.

• A. Antiseptic
• B. Disinfectant
• C. Germicide
• D. All of these

Explanation: Correct option:D(Formalin's function includes all the options)Formalin, which is a solution of formaldehyde gas dissolved in water, is…