Tag: bio-chemistry

Questions Related to bio-chemistry

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

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

  1. Vanadium

  2. Chromium

  3. Molybdenum

  4. Selenium

Show answer
Correct Option: B
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.

Robert Hook was the first person to see cells in:

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

  1. Various ants

  2. Fungi

  3. Animals

  4. Cork

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Correct Option: D
Explanation:

Robert cook first discovered the cells in a cork. He saw small spaces under a microscope and called them cells meaning "little rooms".

So, the correct option is 'cork'.

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

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

  1. Bacteria

  2. Fungi

  3. Virus

  4. Lichens

Show answer
Correct Option: C
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.

Deficiency of which of the following may cause bone deformation?

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

  1. PTH

  2. Vitamin D

  3. STH

  4. Thyroxine

Show answer
Correct Option: B
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.

The vitamin which works along with para thyroid hormone is

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

  1. Vitamin C

  2. Calciferol

  3. Tocopherol

  4. Vitamin - $B _{12}$

Show answer
Correct Option: B
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.

An ${A^o}$ is equal to 

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $10^{-5}$cm

  2. $10^{-6}$cm

  3. $10^{-7}$cm

  4. $10^{-8}$cm

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Correct Option: D

One micrometre (micron, $\mu$m) is equal to

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $0.1$mm

  2. $0.01$mm

  3. $0.001$mm

  4. $0.0001$mm

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Correct Option: C

A nanometre (nm) is equal to 

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $10^{-9}$m

  2. $10^{-7}$cm

  3. $10 {A^o}$

  4. All of the above

Show answer
Correct Option: D

Which is a proper unit for measurement in microscopy?

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. Micron

  2. Angstrom

  3. Nanometre

  4. All of the above.

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Correct Option: C

$1$ micron is equal to _____________.

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $1/100$mm

  2. $1/1000$mm

  3. $1/10000$mm

  4. $1/1,00,000$mm.

Show answer
Correct Option: B
Explanation:

1 Micrometer (µm) is equal to 0.001 millimeter (mm). To convert micrometers to millimeters, multiply the micrometer value by 0.001 or divide by 1000.

Hence, B is the correct option.