- Osmosis
- Exocytose
- Hydrolysis
- Phagocytosis
- d
-
White Blood Cells protect our body.
Osmosis is movement of water only.
Exocytose throw things out of the cells.
Hydrolysis means breaking of something by using water.
2025
All Solved Current and Past Papers of 2025 are included in this section of ETEST Academy’s Website. All MCQs of Year 2025 are solved with short detailed answers. ETEST Academy updates this portion of Past Papers 2025 on daily basis.
An example of the quaternary structure of protein is:
- Disulphide
- Hemoglobin
- Amino Acid
- Peptical Bond
- b
-
Hemoglobin has four protein parts, each part can hold oxygen and together they carry oxygen in blood.
Disulphide, Amino Acid and Peptical Bond are parts of proteins, not whole proteins.
The most important reserve food material of higher plants, made up of many glucose molecules joined together in straight chain is:
- Wax
- Starch
- Lipids
- Cellulose
- b
-
Starch is the main reserve (stored) food of higher plants.
Was is a protective substance.
Lipids are fats that cant reserve food.
Cellulose is a structural material of plant cell wall.
The substances which in low concentration exhibit the growth of micro-organisms are:
- Lipids
- Carbohydrates
- Antibiotics
- Antibodies
- c
-
Antibiotics are substances that stop the growth of microorganisms or kill them, even when present in very small (low) amounts.
Lipids are fats and not used to control microbes.
Carbohydrates provides energy and helps in growth.
Antibodies are produced by the body and provide low concentration to inhibit growth.
Which Organelles has membrane?
- Endoplasmic Reticulum
- Mitochondria
- Golgi apparatus
- All of the above
- d
-
Endoplasmic Reticulum has membrane.
Mitochondria has two membranes.
Golgi apparatus surrounded by membrane.
The water molecule is amphoteric (it acts both as an acid and base). It is the perfect medium for biochemical relations occurring in cells. It acts as:
- An Alkali
- An Acid
- A Solvent
- A steroid molecule
- c
-
Amphoteric means a substance that can act both as an acid and as a base.
Ulva belongs to which group?
- Oomycota
- Algae
- Sea Lettuce
- Protozoa
- c
-
Ulva is a green, simple and multicellular organism. It lives in water. It performs photosynthesis.
It is commonly called Sea Lettuce because it looks like lettuce.
Mitochondria are passed to as animal only by:
- Father
- Sister
- Mother
- Both A and C
- c
-
Mitochondria are the Powerhouses of the cell. They take food and turn into energy that cell can use. Its fact, without Mitochondria cell cannot work or survive.
Mitochondria have their own DNA
A protozoan that have both animal and plant like characteristics is:
- Ulva
- Chlorella
- Phytopthora infestans
- Euglena
- d
-
Euglena is like a tiny green animal.
Which of the following cannot conduct electricity?
- NaCl (Solid)
- NaCl (Molten)
- NaCl (Aqueous)
- Both B & C
- a
-
In NaCl, Ions are fixed in place or in solid form and cannot move.
In NaCl (Molten / Melted), Ions are free to move and electricity can flow.
NaCl (Aqueous / dissolved in water), Na and Cl can dissolved in water and can carry current.