Tag: biology

Questions Related to biology

Which one is hypothetical coagulating factor?

hepatic portal system components of the circulatory system transport in animals the circulatory system biology

  1. Accelerin

  2. Christmas factor

  3. Lakilovand factor

  4. Stuart factor.

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Correct Option: A


The hepatic portal vein is located between the:-

hepatic portal system components of the circulatory system transport in animals the circulatory system biology

  1. hepatic vein and the vena cava

  2. small intestine and the liver

  3. mouth and the stomach

  4. pancreas and the small intestine

Show answer
Correct Option: B
Explanation:

Measuring approximately 8 cm (3 inches) in adults, the portal vein is located in the right upper quadrant of the abdomen, originating behind the neck of the pancreas. In most individuals, the portal vein is formed by the union of the superior mesenteric vein and the splenic vein

So, the correct answer is 'small intestine and the liver'

__________ ml of oxygen is transported per deciliter of blood under normal conditions to tissues.

hepatic portal system components of the circulatory system transport in animals the circulatory system biology

  1. $a = 9.8\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$

  2. $a = 5\ ml, b = 500\ ml, c = 12\ to \ 16, d = -3$

  3. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$

  4. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 18 times, d = 7$

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Correct Option: A

The circulatory system of a rabbit differs from that of a frog in that there 

hepatic portal system components of the circulatory system transport in animals the circulatory system biology

  1. Renal portal system in rabbit

  2. Hepatic portal system in rabbit

  3. Posterior vena cava in rabbit

  4. Dorsal aorta in rabbit

Show answer
Correct Option: C
Explanation:
  • The renal portal system is absent in the rabbit. The hepatic portal system is present in rabbit and it consists of a hepatic portal vein ventral to the post caval vein. It enters into the liver, divides into a number of branches to supply to various lobes of the liver.
  • In the rabbit, the blood from different organs of the body is collected by two superior vena cavae and a posterior vena cava which open separately into the right auricle.
  • In Frog, the blood from different organs of the body is collected by two precavals and one post caval which unite together to form a sinus venosus that in turn opens into the right auricle.

So, the correct answer is 'Posterior vena cava in rabbit'.

Which one is not the use of hepatic portal system?

hepatic portal system components of the circulatory system transport in animals the circulatory system biology

  1. To convert carbohydrate into glycogen.

  2. To separate ammonia.

  3. To kill bacteria.

  4. To convert protein into carbohydrate.

Show answer
Correct Option: D
Explanation:

The hepatic portal system is the system of blood vessels that connect the gastrointestinal system and the liver. The nutrients digested by the intestines are transported to the liver, where the excess of carbohydrates is converted into glycogen. The amino acids are broken down and ammonia is released, which is soon converted to urea through the Ornithine cycle. The liver has Kupffer cells that kill the bacteria before the nutrients move out to the different organs of the body.


Hence, the correct answer is 'To convert proteins into carbohydrates'

Which of the following pairs are correctly matched?
A. Crocodile 4-chambered heart
B. Sea Urchin Parapodia
C. Obelia Metagenesis
D. Lemur Thecodont

hepatic portal system components of the circulatory system transport in animals the circulatory system biology

  1. Only A and B

  2. A, C and D

  3. B, C and D

  4. Only A and D

Show answer
Correct Option: A
Explanation:
  • Reptiles have two chambered heart accept crocodiles which have four chambered heart.
  • In obilia alternation of generation is called metagenesis in which an asezual polyploid generation appears to alternate regularly with a sexual medusoid generation.
  • Thecodont dentition is found in mammals.
  • So, (D) is the correct answer. 

Which of the following is the function of nutrients?

biology nutrition and diet nutrients and foodstuffs introduction to nutrients nutrition and its deficiency simple test for nutrients test for nutrients

  1. It regulates the growth and developement of the body.

  2. It helps in digestion.

  3. It helps in the energy production.

  4. All of the above

Show answer
Correct Option: D
Explanation:

An essential nutrient is a nutrient that the body cannot synthesize on its own  or not to an adequate amount and must be provided by the diet. These nutrients are necessary for the body to function properly. The six essential nutrients include carbohydrates, protein, fat, vitamins, minerals and water. Carbohydrates are the main energy source for the brain. Protein is the major structural component of cells and is responsible for the building and repair of body tissues. Fat is an energy source that when consumed, increases the absorption of fat-soluble vitamins including vitamins A, D, E and K. 

So, the correct option is 'All of the above'.

If a starved plant is provided with glucose the rate of respiration would

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Decrease

  2. Increase

  3. Become constant

  4. First rise than fall

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Correct Option: B
Explanation:

If a starved plant is provided with glucose, the rate of respiration would increase. It is because, carbohydrate is the primary respiratory substrate.

The rate of respiration could be checked by

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Malonate

  2. $CO _2$

  3. Chloroform and cyanides

  4. All of the above

Show answer
Correct Option: D
Explanation:

Respiration in plants is the process which enables the breakdown of  simple carbohydrates, like glucose into simpler substances thereby liberating carbon dioxide and energy. The factors that effect respiration are temperature, carbon dioxide concentration, water and light. The factor that inhibits or checks the rate of respiration in the mitochondria of plants include malonate, CO$ _2$ an chloroform and cyanides.

When evolution of $CO _{2}$ is more than intake of oxygen?

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Sucrose is respaired

  2. Glucose is respaired

  3. Organic acids are respired

  4. Fats are respired

Show answer
Correct Option: C
Explanation:

The amount of oxygen is more in organic acids. Thus when respiration of organic acids takes place, the liberation of $CO _2$ is more. So, the R.Q of organic acid is more than one.