Biology MCQs

Notes:
The stomach is a J-shaped organ and is present on the left side of the abdomen.

Notes:
Hh RR would breed correct for the H locus but since it is heterozygous for the R locus, the R character would not be correct.

Notes:
One whose phenotype is influenced by more than one gene is called a Polygenic trait.

Notes:
The benefits of vermicomposting are to develop roots of the plants, improve the physical structure of the soil, and increase the fertility and water-resistance of the soil.

Notes:
Proteases catalyse the breakdown of proteins into amino acids in the stomach and small intestine. Lipases catalyse the breakdown of fats and oils into fatty acids and glycerol in the small intestine. Amylase catalyses the breakdown of starch into maltose in the mouth and small intestine.

Notes:
Utricularia (also called bladderworts) is a genus of insectivorous plants. They occur in fresh water and wet soil as terrestrial or aquatic species. All Utri cularia are carnivorous and capture small organisms by means of bladder-like traps. Aquatic species feed on protozoa and rotifers swimming in water-saturated soil’ while terrestrial species feed on water fleas (Daphnia), nematodes and even fish fry, mosquito larvae and young tadpoles.

Notes:
The best-known and most common chromosome abnormality in humans is Down’s syndrome, (Trisomy of 21st pair of chromosome). Down’s syndrome individuals also almost invariably develop Alzheimer’s disease, a form of dementia that is fairly common among the elderly people. People with Down’s syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people. These people are also characterized by presence of webbed neck, Plamers crease, very broad forehead, round face and forked tongue.

Notes:
There are three tiny bones in the middle ear of human. These are the malleus or hammer the incus or anvil and the stapes or stirrup. The femur is the only bone located within the human thigh. It is both the longest and the strongest bone in the human body.

Notes:
Taxonomy is the academic discipline of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups. Each group (taxon) is given a rank and groups of a given rank can be aggregated to form a super group of higher rank and thus create a hierarchical classification. Carlous Linneaus is considered as father of taxonomy.

Notes:
100g of peanut oil (groundnut oil) contains 17.7g of saturated fat, 48.3g of monounsaturated fat, 33.4g of polyunsaturated fat, and 0mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.