Biology MCQs

Notes:
A hormone that is synthesized from histidine amino acid is Histamine. While Epinephrine, norepinephrine, and dopamine are amine hormones, which are synthesized by modifying the amino acid tyrosine.

Notes:
Streptococcus Pyogenes, Escherichia Coli, and Pseudomonas Aeruginosaare examples of harmful microbes. They can be transmitted through a variety of mediums in our bodies.

Notes:
The renewable energy source produced by the breakdown of organic matter by some bacteria under anaerobic conditions is called Biogas. This is a mixture of methane, hydrogen, and carbon dioxide.

Notes:
The golden rice variety is rich in Β-carotene and ferritin. Beta carotene is a compound that gives vegetables their bright yellow, orange and red colours.

Notes:
The vaccine is a product of biotechnology. Vaccines prepare the immune system to recognize and attack invaders or antigens.

Notes:
Carbon monoxide poisoning can be cured by exposing the affected person to fresh oxygen. It is because CO posoning leads to oxygen starvation of body cells. This therapy involves breathing pure oxygen in a chamber in which the air pressure is about two to three times higher than normal. This speeds the replacement of carbon monoxide with oxygen in your blood. Hyperbaric oxygen therapy may be used in cases of severe carbon monoxide poisoning.

Notes:
Rickets is the softening and weakening of bones in children, usually because of an extreme and prolonged vitamin D deficiency. Vitamin D promotes the absorption of calcium and phosphorus from the gastrointestinal tract.

Notes:
Histology is the study of the micro anatomy of cells, tissues, and organs as seen through a microscope. It examines the correlation between structure and fun-ction.Histology is the micro-scopic counterpart to gross anatomy which looks at larger structures visible without a microscope.

Notes:
The human heart has four chambers, two superior atria and two inferior ventricles. The atria are the receiving chambers and the ventricles are the discharging chambers. The pathway of blood through the human heart consists of a pulmonary circuit and a systemic circuit.

Notes:
The green color in leaves is caused by the presence of a compound called “chlorophyll,” which the plant produces to do photosynthesis for capturing solar energy. The chlorophyll is green because it absorbs red and blue wavelengths of light — and so green is not absorbed and is reflected, making the plant look green to eyes.