- Cytoplasm
- Centromere
- Atmosphere
- Cytoplasm
- b
-
Centromere means the middle pin of chromosome.
The shape of chromosome depends on the position of this pin.
If it is in the middle then chromosome looks like X-Shape and if it is near the end then chromosome looks like V or L shape.
Health Department
All Health Department Solved Current and Past Papers are included in this portion of ETEST Academy’s Website. All MCQs of Health Department Papers are completely solved with detailed answers.
All of the following are sexual parts of the life cycle of a moss, Except:
- The male gametangium
- The female gametangium
- Rhizoids
- Ovum
- c
-
Male Gametangium produces male sex cells.
Female Gametangium produces female sex cells.
Ovum is a female sex cell.
The hollow, filamentous appendages which help in conjugation in bacteria are:
- Flagella
- Cell wall
- Capsule
- Pilli
- d
-
Pili are tiny hair-like parts on bacteria. They help one bacterium connect with another to pass genetic material during conjugation.
White blood cells picked up foreign bodies from the blood stream and destroy the harmful bacteria which enter into our body. This is the best example of:
- 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.
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.