Assertion : Algae and fungi are classified as thallophytes.
Reason : They both are autotrophs.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Conifer trees produce a large quantity of wind borne pollen grains.
Reason : The pollen grains have wings.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Neurospora is commonly called water mould.
Reason : It belongs to basidomycetes fungi.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : In woody stems, the amount of heart wood continues to increase year after year.
Reason : The cambial activity continues uninterrupted.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Vernalization is acceleration of subsquent flowering by low temperature treatment.
Reason : Site of vernalization is apical meristem.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Plants absorb sulphur in the form of sulphate ions.
Reason : Sulphur bacteria are required for the formation of sulphate.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Dark reaction is purely enzymatic reaction.
Reason : It occurs only in absence of light.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Petroplants produce large amount of latex.
Reason : The latex contains long chain hydrocarbons.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
A child took sugar cane and sucked its juice. Regarding this which of the follwoing match is correct?
Substrate | Enzyme | Site of secretion of enzyme | Products formed |
Proteins | Pepsin | Duodenum | Polypeptides |
Starch | Amylase | Salivary glands | Glucose |
Lipids | Lipase | Pancreas | Fat globules |
Sucrose | Invertase | Duodenum | Glucose + Fructose |
Which of the following is true regarding sperm?
Fertilizin : for penetrating egg membrane
Hyalurodinase : for penetrating egg membrane
Acrosin : dissolves corona radiata
Capacitation : takes place in penis
B.
Hyalurodinase : for penetrating egg membrane
Hyaluronidase is a hydrolytic enzyme present in the acrosome of sperm (human testes). It lyses the glycosaminoglycans in the extracellular matrix holding the cell of the corona radiata together. As the coronal cells become more loosely associated, sperm cells can propel themselves inward, toward the zona pellucida by making a receptive cone or fertilization cone through the cytoplasm of the egg. Hyaluronidase may also be involved in breaking down the Zona Pellucida.
Fertilizin is a chemical substance secreted from the cortical region of egg cytoplasm to attract the sperm towards the egg.
Acrosin is released from the acrosome of a spermatozoa as a consequence of the acrosome reaction. It aids in the penetration of Zona Pellucida.
Capacitation is the final stage in the maturation process of spermatozoa. This takes place inside the genital tract as the sperm penetrates the ovum.