- Enzymes
- Glycerols
- Coenzymes
- Polynucleotide
- c
-
Coenzymes are organic molecules that bind to enzymes and help in chemical reactions.
Biology MCQs
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The primary biological importance of sexual reproduction is as organism is that it:
- Is necessary for the survival of the individual
- Cause new notations to occur in the offspring
- Promotes genetic variability among offspring
- Allows larger no of offspring to be produced
- c
The chromosome has different shapes, depending on the position of:
- 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.
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.