Biology Quiz 7

Thalassemia is a hereditary disease which affects Blood. It is an inherited blood disorder characterised by less oxygen-carrying protein (hemoglobin) and fewer red blood cells in the body than normal.

The virus without capsid but only with nucleic acids is called Nucleoid. Nucleoid represents the viral chromosome. It is made of a single molecule of nucleic acid. Nucleoid is the infective part of the virus. The nucleic acid is either DNA or RNA but never both.

Estrogen is a female hormone that plays various roles. It helps develop and maintain both the reproductive system and female characteristics, such as breasts and pubic hair.

Green plants are the largest fixator of solar energy. All green plants generate and transfer energy through the processes of photosynthesis and respiration.

Tuberculosis (TB) is caused by a bacteria called Mycobacterium tuberculosis. TB bacteria spread through the air from one person to another. When a person with TB disease of the lungs or throat coughs or speaks, TB bacteria can get into the air. People nearby may breathe in these bacteria and become infected.

Sunlight is not required for seed germination. Light isn't strictly necessary for germination in most plant species. All seeds need water, oxygen and suitable temperature to germinate.

Tissue culture (micropropagation) is the growth of tissues or cells in an artificial medium separate from the parent organism. It is a technique in which fragments of plants are cultured and grown in a labouratory.

Vertebrae is a series of bones that form the spinal column (backbone) of all vertebrates. The average person is born with 33 vertebrae that interact and connect with each other through flexible joints called facets. By the time a person becomes an adult most have only 24-26 vertebrae because some vertebrae at the bottom end of the spine fuse together during normal growth and development.

Normally, each cell in the human body has 23 pairs (46) of chromosomes (Half come from the mother and the other half come from the father). Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome.

Mitochondria (singular: mitochondrion) are the power plants of the cells. They transform energy taken up through nourishment into a form the cells can use for a multitude of necessary metabolic reactions.