Biology MCQs

Notes:
MON 863 is a genetically engineered variety of maize produced by Monsanto. It was generated by transformation of Zea mays cell culture line AT824 with a MIuI restriction fragment from plasmid PV-ZMIR13 using particle acceleration technology.

Notes:
Genes controls the protein synthesis and heredity. It is the basic physical and functional unit of heredity and are made up of DNA. Some genes act as instructions to make molecules called proteins.

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Beta vulgaris is beet or sugarbeet or Chukandar and has been widely used as a commercial crop for table sugar. Glorisoa superba is Glory Lily which is an ornamental plant. Asparagus pulmosus is also an ornamental plant. Brassica alba is common mustard. Toona cilata is a timber plant from which Indian Redwood is obtained.

Notes:
Carcinoma group represents the most commonly found cancers in the world. Carcinoma is a cancer which begins in a tissue that lines the inner or outer surfaces of the body, and that arises from cells originating in the endodermal, mesodermal or ectodermal germ layer during embryogenesis.

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Meg-1 gene was developed in Maize. It is an imprinted gene which finds expression only from maternal chromosomes which regulates the transfer of nutrients from the plant to the seed.

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All of the above belongs to a class of drugs known as antihistamines. They interfere with the natural action of histamine by competing with histamine for binding sites of receptor where histamine exerts its effect.

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The coconut water from tender coconut that we are familiar with, is nothing but free nuclear endosperm (made up of thousands of nuclei) and the surrounding white kernel is the cellular endosperm. In the most common types of endosperm development, the Primary Endosperm Nucleus (PEN) undergoes successive.

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Keratin is a group of fibrous proteins occurring in hair, feathers, hooves, and horns. Keratins have coiled polypeptide chains that combine to form supercoils of several polypeptides linked by disulphide bonds between adjacent cysteine amino acids.

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Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves the plant by diffusion through the stomata.

Notes:
A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.