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- Question
Which one of the following statements regarding haemoglobin is correct?
Options- A. Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
- B. Haemoglobin of RBC can carry both oxygen and carbon dioxide
- C. Haemoglobin of RBC can carry only carbon dioxide
- D. Haemoglobin is only used for blood clotting and not for carrying gases.
- Correct Answer
- Haemoglobin of RBC can carry both oxygen and carbon dioxide
ExplanationDuring respiration, about 97% of oxygen is transported by Red Blood Cells in blood and the remaining 3% gets dissolved in the plasma.Around 20-25% of carbon dioxide is carried by haemoglobin as carbamino-haemoglobin.
Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.
- 1. Which one of the following has a bilateral symmetry in its body organization?
Options- A. Asterias
- B. Sea anemone
- C. Nereis
- D. Euchinus Discuss
- 2. Which one of the following organisms is dependent on saprophytic mode of nutrition?
Options- A. Agaricus
- B. Ulothrix
- C. Riccia
- D. Cladophora Discuss
- 3. Which one of the following tissues is responsible for increase of girth in the stem of a plant?
Options- A. Tracheid
- B. Pericycle
- C. Intercalary meristem
- D. Lateral meristem Discuss
- 4. Which one of the following functions is not carried out by smooth endoplasmic reticulum?
Options- A. Transport of materials
- B. Synthesis of lipid
- C. Synthesis of protein
- D. Synthesis of steroid hormone Discuss
- 5. Synapse gap is present between which of the following?
Options- A. Two neurons
- B. Brain and Spinal Cord
- C. Two Kidneys
- D. None of these Discuss
- 6. Which one of the following statements is correct?
Options- A. Urea is produced in liver
- B. Urea is produced in blood
- C. Urea is produced from digestion of starch
- D. Urea is produced in lung and kidney Discuss
- 7. Which of the following disease is caused by female Anopheles mosquito?
Options- A. Chicken Pox
- B. Malaria
- C. Black Fever
- D. Cholera Discuss
- 8. Which of the following transports water from the roots of the plant to its leaves?
Options- A. Xylem
- B. Phloem
- C. Both xylem and phloem
- D. Cortex Discuss
- 9. Kyoto Protocol is associated with
Options- A. Species conservation
- B. Climate change
- C. Wetland Conservation
- D. Medicinal plants Discuss
- 10. Which one of the following elements is involved in the control of water content of the blood?
Options- A. Potassium
- B. Lithium
- C. Rubidium
- D. Caesium Discuss
Biology problems
Search Results
Correct Answer: Asterias
Explanation:
Asterias has bilateral symmetry only at larval stagebut fivefold symmetry (pentamerism, a special type of radial symmetry) as adults.
Nereis do not possess any symmetry elements in their body organisation.
Correct Answer: Agaricus
Explanation:
Saprophytic fungi feed on dead plant and animal remains. Many are extremely beneficial, breaking down this organic material into humus, minerals and nutrients that can be utilised by plants. Agaricus is one among them.
Correct Answer: Lateral meristem
Explanation:
In vascular plants, the lateral meristem is one of two meristems in which growth occurs in order to increase stem girth. A meristem is the region of plant tissue found on the tips of roots and shoots. It is where cell division occurs to produce new growth.
Correct Answer: Synthesis of protein
Explanation:
Smooth Endoplasmic Reticulumdoes not contain ribosomes on its surface for which it is regarded as smooth. So, proteins cannotbe synthesised by SER provided protein synthesis is the primary task of ribosomes.
Correct Answer: Two neurons
Correct Answer: Urea is produced in liver
Explanation:
Urea is produced in the liver and is a metabolite (breakdown product) of amino acids. Ammonium ions are formed in the breakdown of amino acids. Some are used in the biosynthesis of nitrogen compounds. Excess ammonium ions are converted to urea.
Correct Answer: Black Fever
Correct Answer: Both xylem and phloem
Correct Answer: Climate change
Correct Answer: Potassium
Explanation:
Aldosterone is a key steroid hormone critical for maintaining salt and water balance. It regulates the concentration of minerals, like sodium and potassium, in the fluid outside your cells. When your sodium levels drop, or potassium levels rise, your body signals your adrenal glands to release aldosterone into your blood. Aldosterone signals your kidneys to reabsorb sodium into the blood, and acts on your sweat glands to reduce sodium loss through sweat.
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