Biology MCQs

Notes:
The insect “Apis mellifera” is commonly known as the honey bee. The Western honey bee is the most common of the 7–12 species of honey bees worldwide. The genus name “Apis” is Latin for “bee”, and “mellifera” is Latin for “honey-bearing” or “honey carrying”.  Honey bees are known for their role in pollination. They were domesticated for honey production and crop pollination. Honey bees produce honey, wax, propolis, and royal jelly.  Honey bees are red/brown with black bands and orange yellow rings on their abdomen. They have hair on their thorax and less hair on their abdomen. The workers and queens have stingers, whereas the drones are stingless.

Notes:
Lysosomes are membrane-bound cell organelles that contains digestive enzymes and are involved with various cell processes. They break down excess or worn-out cell parts and may be used to destroy invading viruses and bacteria.

Notes:
The natural Pacemaker in the Human Heart is located in the SA node which is present in right auricle chamber. It’s a small mass of specialized cells located in the top of the right atrium i.e., the upper chamber of the heart.

Notes:
Reptiles and Amphibians have a mixed heart.

Notes:
A heterotroph obtains its energy from organic molecules. An autotroph obtains energy from sunlight utilizing pigments including chlorophyll (A) and uses CO₂ and water to make organic molecules. heterotrophs can obtain their energy from ingesting autotrophs, but can also consume other heterotrophs.

Notes:
Cattle quickly swallow grass and store it in rumen. The rumen serves as a large fermentation vat in which bacteria and other microorganisms reside. The rumen, also known as a paunch, forms the larger part of the reticulorumen

Notes:
A lineage is a single line of descent or linear chain within the tree while a clade is a monophyletic group, containing a single ancestor and all its descendants. Phylogenetic trees are typically created from DNA, RNA or protein sequence data.

Notes:
Malaria is a life-threatening disease. It’s typically transmitted through the bite of an infected Anopheles mosquito. Infected mosquitoes carry the Plasmodium parasite. When this mosquito bites you, the parasite is released into your bloodstream.

Notes:
Phenylketonuria (PKU) is an inborn error of metabolism due to atrophy of endocrine glands that results in decreased metabolism of the amino acid phenylalanine. Untreated, PKU can lead to intellectual disability, seizures, behavioral problems, and mental disorders. It may also result in a musty smell and lighter skin.

Notes:
• The islets of Langerhans are a cluster of cells within the pancreas that are responsible for the production and release of hormones that regulate glucose levels.
• Growth hormone is also called somatotropin or human growth hormone, peptide hormone. It is secreted by the anterior lobe of the pituitary gland. It stimulates the growth of essentially all tissues of the body, including bone.
• Calcitonin is a hormone that is produced in humans by the parafollicular cells of the thyroid gland. Calcitonin is involved in helping to regulate levels of calcium and phosphate in the blood, opposing the action of parathyroid hormone.
• Hormones secreted by the adrenal medulla are Epinephrine. Most people know epinephrine by its other name—adrenaline. This hormone rapidly responds to stress by increasing your heart rate and rushing blood to the muscles and brain.