Biology MCQs

Notes:
Viral neuraminidase is a type of neuraminidase found on the surface of the influenza virus that enables the virus to be released from the host cell. Neuraminidases are enzymes that dissociate sialic acid groups from glycoproteins.

Notes:
Pteridophytes are vascular, spore-forming, non-seed-forming, non-flowering plants. The phloem of pteridophytes does not have companion cells.

Notes:
The cork cambium, cork cell and phylloderm are collectively called the periderm. The periderm substitutes for the epidermis in mature plants.

Notes:
Chlorophyll is the natural compound present in green plants that gives them their green colour. It helps plants absorb energy from the sun as they perform photosynthesis.

Notes:
In sirens and salamandrids, lentic systems are found. Lentic ecosystems are those that have still water and are composed of ponds, swamps, ditches, lakes, and marshes.

Notes:
Kiwi, Ostrich, Kakapo, Steamer duck, Takahe, Cassowary, Weka, and Penguin birds cannot fly.

Notes:
Various animal by-products are produced from fats. These include

1. Candles: Traditionally, animal fat, particularly tallow, was used to make candles before the development of more modern materials.
2. Linoleum: Linseed oil is a primary ingredient in genuine linoleum, and it is sometimes mixed with other oils like castor oil, that derive from animal fats.
3. Shoe cream: Shoe creams and polishes regularly use animal fats to help condition and soften the leather.
4. Cellophane: Cellophane isn’t made directly from animal fat, but its production includes the use of glycerol, which can be derived from animal fats.

Notes:
Sinuses are the bone around the nose that contains hollow, air-filled chambers. Mucus from the sinuses flows into the nasal cavity.

Notes:
The thigh bone or femur is the longest and strongest bone in your body.

Notes:
Mucus helps to protect the stomach wall from its secretion of hydrochloric acid.