Tag: evs

Quizzes (439) Questions (4580)

Questions Related to evs

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

Critical count of Platelete is _______________

  1. $4\times 10^4 /mm^3$
  2. $1 \ lakh /mm^3$
  3. $2 \ lakh /mm^3$
  4. $4 \ lakh /mm^3$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Platelet count is the number of platelets in the blood. The normal platelet count ranges from 2- 5 lakh cells/mm$^3$. In disease conditions like dengue, the platelet count is decreased below the average value. This condition is called thrombocytopenia. If platelet count drops below 1 lakh /mm$^3$, it is considered as critical platelet count it denotes that person is at high risk of bleeding.
So, the correct answer is 'Option B'.
Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

During heat shock to the bacterium , the temperature used for giving thermal shock is:

  1. $82^oC$
  2. $109^oC$

  3. Liquid nitrogen
  4. $42^oC$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Heat Shock is given to bacteria for transformation that alters the membrane fluidity. The increase in temperature creates pores in the bacterial plasma membrane and allow plasmid DNA to enter the bacterial DNA. For the heat shock, the DNA-bacteria mixture is put into a 42C to 37C water bath. 

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

TLC of human blood is about?

  1. $5000 - 6000$ per ml of blood
  2. $5000 - 11000$ per ml of blood
  3. $5000 - 11000$ per cubic mm of blood
  4. $2000 - 6000$ per cubic mm of blood
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
TLC or the total leukocyte count is calculated by a laboratory test. It calculates the number of cells present in a fixed volume of blood (or area). The standard TLC of blood in humans usually ranges from 4,000 and 11,000 cells in every microliter of blood. This value can vary from one race to another.
So, the correct answer is '5000−11000 per ml of blood'.
Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

Choose the correct answer from the four options given.
The lifespan of RBC is?

  1. $100$ days
  2. $120$ days
  3. $110$ days
  4. $130$ days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In human physiology, mature red blood cells (erythrocytes) have an average lifespan of approximately 120 days in circulation before they are destroyed and recycled by macrophages in the spleen and liver.

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

If $1$gm of Hb carries $1.34$mL of $O _2$ and $100$mL of blood has $15$gm Hb then, how much $O _2$ will be carried approximately by $100$mL of arterial blood?

  1. $40$mL
  2. $20$mL
  3. $50$mL
  4. $100$mL
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Given that 1 gram of hemoglobin carries 1.34 mL of oxygen and 100 mL of blood contains 15 grams of hemoglobin, the oxygen carrying capacity is calculated as 15 times 1.34 mL, which equals 20.1 mL, approximately 20 mL. Therefore, option B is correct.

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

Which of the following biomolecules is made up of that monomer which has three chemically distinct components, one is heterocyclic compound, the second is a monosaccharide and the third is a phosphate?

  1. Haemoglobin

  2. r-RNA

  3. Lecithin

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

The monomer described is a nucleotide, which consists of a nitrogenous base (heterocyclic compound), a pentose sugar (monosaccharide), and a phosphate group. Nucleotides are the building blocks of nucleic acids such as r-RNA.

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

The process of formation of various types of blood cells is known as?

  1. Hemoglutination

  2. Hemolysis

  3. Haemophilia

  4. Haemopoiesis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The process of making blood cells is called haemopoiesis. Blood cells are made in the bone marrow. That's a spongy tissue located inside some bones. It contains young parent cells called stem cells. These blood-forming stem cells can grow into all 3 types of blood cells – red cells, white cells, and platelets. These blood-forming stem cells make copies of themselves, and they also produce mature blood cells. When blood cells are fully mature and functional, they leave the bone marrow and enter the blood. Healthy people have enough stem cells to keep making all the blood cells they need every day.

Therefore, the correct option is D.

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

Blood platelets

  1. Help in the production of red blood cells in the bone marrow.

  2. Clot the blood.

  3. Are produced in liver.

  4. Fight disease-causing germs.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blood platelets or thrombocyte is another word for platelet, the blood cell that is responsible for normal blood clotting. The root "thrombo" means clot, and you will see it used with diseases and conditions that affect the platelets and blood clotting.

So, the correct option is 'Clot the blood'.