Multiple Choice QuestionsAssertion : 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
B.
If both assertion and reason are true but reason is not the correct explanation of assertion
Vernalization is coolong of seed during germination in order to accelerate flowering when it is planted.
In colder countries, there are cereals of 2 physiological types, i.e., winter cereals and spring
cereals. Winter cereals are sown in winter and flower in following summer whereas spring cereals are sown in spring and flower in summer.
If winter cereal are sown in spring, it shows vegetative growth but does not flower unless it receives low temperature of winter. However, they can be converted into spring cereal by providing artificial low temperature treatment, (i.e., springification.)
Some plants requiring low temperature requirement (vernalization) for flowering are Secale cereale (European rye), Triticum vulgare, Brassica oleracea, Beta vulgaris, Apium and Lolium perenne, etc.
Site of vernalization is apical meristem or all the meristematic cells. As a result of vernalization, a flowering hormone called "vernalin" is formed (reported by Melchers), but venalin has never been isolated. Once a plant is vernalized, it can be devernalized by exposing the plant to temperature of 30C or above. For establishing vernalization, plant should be kept at 20°Cfor 4-5 days.
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
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