Biology Quiz 7

Physical exercise is one of the most effective tools for strengthening the heart muscle, keeping weight under control and warding off the artery damage from high cholesterol, high blood sugar and high blood pressure that can lead to heart attack or stroke.

Thyroid gland uses iodine to make thyroid hormones, which help control growth, repair damaged cells and support a healthy metabolism.

Vitamin B₁₂, cobalamin, is a cobalt-containing ring-contracted modified tetrapyrrole that represents one of the most complex small molecules made by nature. The core component of cobalamin is the corrin macrocycle that acts as the main ligand for the cobalt.

Cyanide poisoning causes death in seconds because it breaks the electron transport chain. Cyanide blocks the cellular electron transport mechanism and cellular respiration by inhibiting the mitochondrial ferricytochrome oxidase system and other enzymes.

A glass snake (glass lizard) is a long, slender, legless lizard that superficially resembles a snake but is not a true snake. It has no legs but is not a snake, making it a unique and interesting member of the reptile kingdom.

DNA fingerprinting is a technique that shows the genetic makeup of a person or other living things. It is used to establish a link between biological evidence and a suspect in a criminal investigation.

Blood types are determined by the presence or absence of certain antigens. There are 4 main blood groups – A, B, AB and O. Blood group is determined by the genes inherited from the parents. AB-positive blood type is known as the “universal recipient” because AB-positive patients can receive red blood cells from all blood types.

Corpus luteum (CL) is a yellow hormone-secreting body in the female reproductive system which secretes progesterone. It is a completely normal cyst that forms on the ovary every single month in women of childbearing age. This cyst is actually a group of cells inside ovaries that forms during each menstrual cycle. It appears right after an egg leaves the ovary (ovulation).

Cytology is the study of cells as fundamental units of living things. A cytology test is used to look closely at cells and body fluids.

It is the nerve tissue where no cell division occurs after birth. Cell division is the process by which a parent cell divides into two daughter cells with the same genetic material. There are two types of cell division: mitosis and meiosis. There is absence of centrioles in the nerve cells and because of this they are unable to perform mitosis and meiosis and hence these cells do not divide.