Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

Multiple choice bio-chemistry minerals minerals and vitamins nutrition and diet role of various nutrients

This trace element is needed for insulin to exert its maximal effect in glucose uptake

  1. Vanadium

  2. Chromium

  3. Molybdenum

  4. Selenium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chromium is an essential element involved in the regulation of blood glucose levels within the body. It interacts with the low-molecular weight chromium binding substance to amplify the action of insulin. The amount of chromium in the body can be decreased as a result of a diet high in simple sugars, which increases the excretion of the metal through urine.

Multiple choice bio-chemistry taxonomy of angiosperms cell as structural and functional unit introduction to cell discovery and cell theory cell discovery

One of the following is an exception to the 'cell theory'. 

  1. Bacteria

  2. Fungi

  3. Virus

  4. Lichens
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Schleiden and Schwann in 1839 formulated cell theory. 
  • There are several exceptions to cell theory, e.g., viruses do not have a cellular structure. 
  • They replicate but are non-living particles made up of proteins and nucleic acids. 
  • Only one nucleic acid is found in a virus particle either RNA or DNA.
Thus, the correct answer is option C.

Multiple choice bio-chemistry control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Deficiency of which of the following may cause bone deformation?

  1. PTH

  2. Vitamin D

  3. STH

  4. Thyroxine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rickets is a disorder caused by a lack of vitamin D, calcium, or phosphate. It leads to softening and weakening of the bones. Vitamin D helps the body control calcium and phosphate levels. If the blood levels of these minerals become too low, the body may produce hormones that cause calcium and phosphate to be released from the bones. This leads to weak and soft bones.

Multiple choice bio-chemistry control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

The vitamin which works along with para thyroid hormone is

  1. Vitamin C

  2. Calciferol

  3. Tocopherol
  4. Vitamin - $B _{12}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A fall in the concentration of calcium in the bloodstream is detected by the parathyroid glands, which then produce parathyroid hormone. 

Parathyroid hormone increases the activity of the enzyme 1-hydroxylase, which produces active vitamin D. This increase in the concentration of calcium together with vitamin D feeds back to the parathyroid glands to stop further parathyroid hormone release. The production of vitamin D is also directly regulated by calcium, phosphate and calcitriol.