Biology MCQs

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Several species of tapeworms cause taeniasis. Salmonella gallinarium causes foul typhoid or salmonellosis. Haemophilus gallinarium causes foul coryza. Pasteurella avicida causes chicken cholera.

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Tricho-Card is a nonpathogenic product that is used in various crops as well as horticulture and ornamental plants.

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Haemoglobin is called as tetrameric hemoprotein, while myoglobin is called monomeric protein. Haemoglobin is found systematically all over the body, while myo-globin is found in muscles tissues only. The body requires iron for the synthesis of its oxygen transport proteins, in particular hemo-globin and myoglobin.

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The plastid is a major double-membrane organelle found in the cells of plants. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis, and the types of pigments present can change or determine the cell’s colour.

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The principal chemical component of vegetable fibres is cellulose, with varying amounts of lignin and hemicelluloses also usually present; thus, the fibres are also referred to as cellulosic or lignocellulosic. Examples include cotton, hemp, jute, flax, ramie, sisal, bagasse, and banana. Vegetable fibres are usually stiffer but less tough than synthetic fibres.

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Solitary cymose inflorescence refers to a determinate inflorescence composed of a single flower. Examples include poppy, gardenia (ornamental plant), tulip, etc. Flowers are said to be solitary when the plant bears only one, or when single flowers appear on the ends of lateral branches that are remote from one another.

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Vitamin D is essential in helping the body absorb and use calcium; in fact, the body cannot absorb calcium at all without some vitamin D. Vitamin D helps our intestines absorb calcium from the food we eat and helps build stronger bones.

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The term smooth muscle refers to a muscle of the human body that is part of a involuntary muscle group. The walls of hollow organs are the primary place that smooth muscles can be found. Some of those locations include: Walls of blood vessels, walls of stomach, intestines, large (aorta) and small arteries and veins, urinary bladder, uterus, male and female reproductive tracts, respiratory tract, etc.

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Phytochrome is a photoreceptor, a pigment that plants use to detect light. It is a protein with a bilin chromophore. It detects mainly red and far-red region of the visible spectrum and regulates germination of seeds in photoblastic seeds.

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Pellagra also called ‘necklace disease’ defines systemic disease as resulting from a marked cellular deficiency of niacin (vitamin B3). It is characterized by 4 “D’s”: diarrhea, dermatitis, dementia, and death. Scurvy is a state of dietary deficiency of vitamin C (ascorbic acid). It causes general weakness, anaemia, gum disease, and skin hemorrhages.