Blood of AB group cannot be given to B group patient because :
  • a)
    Patient has antibodies b
  • b)
    Patient lacks antibodies b
  • c)
    Patient lacks antibodies a
  • d)
    Patient has antibodies a
Correct answer is option 'D'. Can you explain this answer?

Chandreshwar Mishra answered  •  yesterday
Blood of AB group cannot be given to B group patient because :
The ABO blood group system consists of 4 types of blood group – A, B, AB, and O and is mainly based on the presence or absence of antigens on RBC and antibodies in the plasma. Individuals with AB blood group have Both Antigen A and Antigen B on RBC and no antibodies in plasma and individuals with B blood group have antigen B on RBC and Anti A antibodies in plasma. Blood of AB group cannot be given to B group patient because the patient has Anti A antibodies. The Anti A antibodies attack the blood cells of AB blood group person (as they have Antigen A on their RBC) and destroy them.
So, the correct answer is 'No Anti A and Anti B antibody'.

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Åãryåñ answered  •  2 weeks ago
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By which sugar insects muscle or wings never fatigue?

Akanksha Mahalle answered  •  2 weeks ago
Trehalose sugar--->The non-reducing disaccharide, trehalose, is found in the haemolymph of several insects, and trehalose is an insect blood sugar..Trehalose is the major carbohydrate energy storage molecule used by insects for flight.One possible reason for this is that the glycosidic linkage of trehalose, when acted upon by an insect trehalase, releases two molecules of glucose, which is require... more

Carrots are micropropagated through
  • a)
    Embryo
  • b)
    Embryoids
  • c)
    Shoot culture
  • d)
    Callus
Correct answer is option 'D'. Can you explain this answer?

Akanksha Mahalle answered  •  2 weeks ago
Callus is a group of undifferentiated mass of cells. The carrot plant can be produced by the cultivation of callus.

Aldosterone causes the reabsorption of Na- ions from which part of nephron
  • a)
    PCT
  • b)
    DCT
  • c)
    Renal artery
  • d)
    LOH
Correct answer is option 'B'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 22, 2020
Aldosterone causes sodium to be absorbed and potassium to be excreted into the lumen by principal cells. In alpha intercalated cells, located in the late distal tubule and collecting duct, hydrogen ions and potassium ions are exchanged. Hydrogen is excreted into the lumen, and the potassium is absorbed.Aldosterone (C21H28O5) is a mineralocorticoid hormone compound secreted by the adrenal gland cor... more

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Which one of the following will not directly affect transpiration ?
  • a)
    Temperature
  • b)
    Light
  • c)
    Wind Speed
  • d)
    Chlorophyll content of leaves
Correct answer is option 'D'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 14, 2020
External factors affecting the rate of transpiration are: atmospheric humidity, temperature, light, wind velocity, atmospheric pressure and available soil water. Some internal factors also affect rate of transpiration e.g., leaf area, leaf structure and age of plants. Chlorophyll content of leaves does not directly affect rate of transpiration. hence, option d is correct one.

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At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles?
  • a)
    Anaphase-I
  • b)
    Anaphase-II
  • c)
    Metaphase-I
  • d)
    Metaphase-II
Correct answer is option 'B'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 14, 2020
In meiosis, two divisions occur after one round of DNA replicatIon. The first division is reductional and homologous chromosomes separate during this division but second division is equational as centromere splits during second division. Sister chromatids move towards opposite poles in anaphase II of second division.
hence , correct option is b.

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Which of the following is the contractile protein of a muscle ?
  • a)
    Tropomyosin
  • b)
    Tubulin
  • c)
    Myosin
  • d)
    All of the these
Correct answer is option 'C'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 14, 2020
Myosin is formed of the myofibril, which is very fine contractile fibres. Myofibril is groups of fibres, which extend in parallel columns along the length of striated muscle fibres. These binds to the actin and leads to shortening of sarcomeres. It hydrolyzes the ATP to form ADP, which is used for muscle contraction.

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‘YAC’ refers to :
  • a)
    Yeast artificial cell
  • b)
    Yeast artificial chromosome
  • c)
    Yeast artificial colony
  • d)
    None of these
Correct answer is option 'B'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 14, 2020
YAC refers to the yeast artificial chromosome which is derived from DNA of yeast S. ... The DNA is ligated into the bacterial plasmid. By inserting large fragments of DNA, the inserted sequences can be cloned and mapped by chromosome walking and this method was used in the Human Genome Project.

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volume of urine is regulated by 
  • a)
    Aldosterone
  • b)
    Aldosterone,ADH and testosterone
  • c)
    Aldosterone and ADH
  • d)
    none of these
Correct answer is option 'C'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 13, 2020
The concentration of urine is controlled by vasopressin by regulating the reabsorption of water in the collecting tubule. It is known as antidiuretic hormone released by the posterior pituitary. It triggers the release of aldosterone and increases the concentration of sodium ions in the blood. The increased salt concentration in the blood increases the blood osmotic potential which further increas... more

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Amount of urea is minimum in
  • a)
    pulmonary vein
  • b)
    hepatic artery
  • c)
    hepatic portal vein
  • d)
    renal vein
Correct answer is option 'D'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 13, 2020
Renal vein contains the least amount of urea. The renal artery enters the kidney as afferent arteriole. It carries the urea loaded blood into the glomerulus of the kidney. The blood is filtered by the glomerulus into the Bowman's capsule and runs parallel to the Loop of Henle. The urea is absorbed into the nephric filtrate by the process of tubular secretion in the loop of Henle, distal convoluted... more

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The term "New Systematics" was introduced by
  • a)
    Bentham & Hooker
  • b)
    Linnaeus
  • c)
    Julian Huxley
  • d)
    A.P. de Candolle
Correct answer is option 'C'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 11, 2020
The term New Systematics was given by Sir Julian Huxley in 1940. This classification take into account the cytological , morphological , genetical , anatomical and physiological characters....A.P de Condolle termed taxonomy , Linnaeus is related to artificial taxonomy whereas Bentham & Hooker is related to natural classification system..New Systematics can also called as BIOSYSTEMATICS.

The kidney of adult mammals are
  • a)
    Mesonephros
  • b)
     rletanaphros
  • c)
    pronephros
  • d)
    Opisthonephron
Correct answer is option 'D'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 09, 2020
Opisthonephric kidney is the adult kidney of anamniotes such as shark and mud puppy and develops from all or most of nephric ridge posterior to pronephros.

Rhizome reproduction observed in
  • a)
    Potato
  • b)
    Ginger
  • c)
    Achhrynthus
  • d)
    All the above
Correct answer is option 'B'. Can you explain this answer?

Prem Darade answered  •  Oct 08, 2020
Rhizome is an horizontally growing underground stem as in ginger. Solanum tuberosum is potato, which can be propagated vegetatively by fleshy stem called tuber. Achyranthes usually shows sexual reproduction.

System of classification used by Linnaeus
  • a)
    Natural system
  • b)
    Artificial system
  • c)
    Phylogenetic system
  • d)
    Asexual system
Correct answer is option 'B'. Can you explain this answer?

Akanksha Mahalle answered  •  Oct 07, 2020
Artificial system of classification was given by Carl Linnaeus in which the floral characters and some morphological character are to be considered...

Totipotent Cell in hydra known as
  • a)
    Choanocyte cell
  • b)
    Interstitial cell
  • c)
    Vegetative cell
  • d)
    Reproductive cell
Correct answer is option 'B'. Can you explain this answer?

Aiswarya Aishu answered  •  Oct 05, 2020
Totipotency means the part of plant tissue capable to give raise to a new one.totipotency is the key word used in tissueculture.interstitial cell of hydra is totipotent cell.

Elimination f insoluble calcium phophate takes place by
  • a)
    Large intestine
  • b)
    Lungs
  • c)
    Liver
  • d)
    Kidney
Correct answer is option 'A'. Can you explain this answer?

Anitha Jadhav answered  •  Aug 28, 2020
The calcium ions bind to the phosphateand are present in the dietary food sometimes calcium phosphate is a salt which is insoluble in water the calcium ions are absorbed by the cells of the intestinal as per the requirement the excess of calcium nd phosphate ions are excreted by the large intestine in the form of fences


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The statement that illustrate the law of multiple proportions is
  • a)
    3.47 g of BaCl2 reacts with 2.36 g of Na2SO4 to give 3.88 g BaSO4 and 1.95 g NaCl.

     
  • b)
    Hydrogen sulphide contains 5.89% hydrogen, water contains 11.1% hydrogen and sulphur dioxide
    contains 50% oxygen.
  • c)
    An element forms two oxides, XO and XO2 containing 50% and 60% oxygen respectively. The ratio
    of masses of oxygen which combines with 1 g of element is 2 : 3.
  • d)
    20 mL ammonia gives 10 volumes N2 and 30 volumes H2 at constant temperature and pressure
Correct answer is option 'C'. Can you explain this answer?

MOHNISH LAL answered  •  Jun 08, 2020
In XO, 50 g element combines with 50 g oxygen
 1 g element combines with 1 g oxygen.
In XO2, 40 g element combines with 60 g oxygen
 1 g element combines with 1.5 g oxygen
Thus, ratio of masses of oxygen which combines with 1 g of element is 1 : 1.5 or 2 : 3. This is in
accordance with the law of multiple proportions. In (B) the law of reciprocal proportions is followed.
In (A) law of conservation of mass is followed while in (D) Avogadro’s law is followed

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