Tag: zoology

• Differential scanning calorimetry or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature.
•  Hence, Differential scanning calorimeter is used to study the thermal behaviour of water.
• So, the correct answer is 'Differential scanning calorimeter'.

Approximately 97% of Earth's water is saline (oceans), leaving only about 3% as freshwater, most of which is locked in glaciers and ice caps.

With development and advancement, industries, factories and other establishments have become necessary reality, the pollution can be mitigated by adopting measures as to the treatment of waste at generating source before it is exposed in the environment, reducing the generation of waste material and recycling the waste over and again wherever possible. Preventing the discharge that contaminates the fresh drinking water source.

World Water Day is an annual United Nations observance day held on March 22nd to highlight the importance of freshwater.

Pollution renders existing water unusable, population growth increases demand, and industrial development consumes large quantities of water, all contributing to scarcity.

• Myeloma, also known as multiple myeloma, is a blood cancer arising from plasma cells. 
• Plasma cells are a type of white blood cell made in the bone marrow. Bone marrow is the ‘spongy’ material found in the centre of the larger bones in the body and is where all blood cells are made. 
• Myeloma develops when DNA is damaged during the development of a plasma cell. 
• This abnormal cell then starts to multiply and spread within the bone marrow.
• Hence, Cells obtained from cancerous tumours are known as Myeloma.
•  So, the correct answer is 'myeloma'.

Cancer is a group of disease, that involves abnormal cell growth (abnormal cell division), with the potential to invade or spread to other parts of the body. They compete with normal cells for nutrients. Contact inhibition is a growth mechanism, which functions to keep cells growing into a layer one cell thick or monolayer. The cancer cells do not show contact inhibition and they grow uncontrollably.
Thus, the correct answer is option (D), 'They show contact inhibition'.

PCBs (polychlorinated biphenyls) and dioxins are persistent organic pollutants known to be carcinogenic. They accumulate in the food chain and are linked to various types of cancer.

• HeLa cells are the cell type in immortal cell lines used in scientific research. It is the oldest and most commonly used human cell line.
• The line was derived from cervical cancer cells taken on February 8, 1951, from Henrietta Lacks, a patient who died of her cancer on October 4, 1951.  These cells are grown in a laboratory and are used for conducting many experiments.

Cancer is a group of diseases involving the abnormal cell growth where there is invasion of the local tissue and there is a potential to invade or spread to other body parts .
Therefore, the correct answer is option D.