Biology MCQs

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The Leydig cells which are found in the human body are the secretory source of Androgens.

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Oviducts are a part of the female reproductive system. It is also called the fallopian tube. It is the site of fertilization that connects the ovary to the uterus.

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Providing nutrition to germ cells is the function of Sertoli cells in the male reproductive system.

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Southern blotting is the transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet.

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Identification of drugs through genomic studies is called Pharmacogenomics. Pharmacogenomics may improve health care costs and efficiency.

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Ligase enzymes help in the binding of DNA. An enzyme that can catalyze the joining (bonding) of two large molecules by forming a new chemical bond is called a ligase.

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These types of mechanism have been termed seismonastic movements. The movement occurs when specific regions of cells lose turgor pressure, which is the force that is applied onto the cell wall by water within the cell vacuoles and other cell contents.

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The small intestine, the part of the gastrointestinal tract between the stomach and the large intestine, is the main digester and absorber of food. The small intestine has three distinct regions – the duodenum, jejunum, and ileum–that carry out the absorption of nutrients and minerals from food. It converts the food into a semi-solid mass.

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The gap between the two neurons is called the synapse. It is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron. Synapses are essential to neuronal function : neurons are cells that are specialized to pass signals to individual target cells, and synapses are the means by which they do so.

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The skin is the soft outer covering of vertebrates that guards the underlying muscles, bones, ligaments, and internal organs. The cutaneous membrane is the technical term for our skin. The skin’s primary role is to help protect the rest of the body’s tissues and organs from physical damage such as abrasions, chemical damage such as detergents, and biological damage from micro organisms. Our skin is made of three general layers. In order from most superficial to deepest they are the epidermis, dermis, and subcutaneous tissue.