{"id":40733,"date":"2017-04-05T12:17:13","date_gmt":"2017-04-05T12:17:13","guid":{"rendered":"http:\/\/news.gyankatta.org\/?p=40733"},"modified":"2017-04-05T12:22:30","modified_gmt":"2017-04-05T12:22:30","slug":"objective-type-multiple-choice-assertion-reason-type-questions-from-biology","status":"publish","type":"post","link":"https:\/\/news.gyankatta.org\/?p=40733","title":{"rendered":"objective type multiple choice assertion-reason type questions from Biology"},"content":{"rendered":"
\n
(a) Both A and R are true and R is the correct explanation of A
\n(b) Both A and R are true but l. is not a correct explanation of A
\n(c) A is true but R is false
\n(d) A is false but R is true<\/div>\n
<\/div>\n
1. Assertion (A): The degeneration of tadpole tail occurs during metamorphosis.
\nReason (R): This degeneration is brought about by hydrolytic enzymes.
\nAns. (a)<\/div>\n
2. Assertion (A): Geological evidence indicates that free oxygen began accumulating in the atmosphere about two billion year ago.
\nReason (R): The free oxygen in the atmosphere is produced by cyanobacteria like forms.
\nAns. (d)<\/div>\n
3. Assertion (A): Thalassaemia is a dreaded disease of blood caused by structural variations in or globin chains.
\nReason (R): Structural variations in globin chains are due to amino acid replacements.
\nAns. (a)<\/div>\n
4. Assertion (A): Prokaryote cells prolife-rate at a much more rapid rate than eukaryotes.
\nReason (R): In prokaryotes there is no condensation of the chromosomes, no spindle apparatus and they follow a simple duplication and separation of DNA pattern.
\nAns. (a)<\/div>\n
5. Assertion (A): Each gene can exist in a variety of different forms called alleles.
\nReason (R): Different alleles of the same gene arise by heritable changes (mutations) in the gene itself.
\nAns. (a)<\/div>\n
6. Assertion (A): Pila produces two types of sperm, namely eupyrene and oligopyrene.
\nReason (R): Eupyrene sperm has XX chromosomes and can produce only female while oligopyrene sperm has XV chromosomes and can produce only male.
\nAns. (c)<\/div>\n
7. Assertion (A): Echinodermata and Hemichordata are both deuterostomes.
\nReason (R): During early development of these \u2018phyla, the blastopore becomes the mouth opening.
\nAns. (c)<\/div>\n
8. Assertion (A): Bryozoa is now divided into two separate phylaendoprocta and Ectoprocta
\nReason (R): Though Endoprocta has some superficial similarities with Ectoprocta, the former is acoelomate and the latter acoelomate.
\nAns. (c)<\/div>\n
9. Assertion (A): The \u2018killer\u2019 stains of Paramecium aurelia produce a toxic substance (paramecin) which kills the \u2018sensitive\u2019 ones.
\nReason (R): Such \u2018killer\u2019 stains lack the Kappa particles.
\nAns. (c)<\/div>\n
10. Assertion (A): The adults of echinoderms generally exhibit pentamerous radial symmetry.
\nReason (R): A unique ambulacral system is typically present in echinoderms.
\nAns. (b)<\/div>\n
11. Assertion (A): Balanoglossus is not a chordate.
\nReason (R): The so-called notochord of Balanoglossus is only pre-oral extension of the gut.
\nAns. (a)<\/div>\n
12. Assertion (A): In birds, the synsacrum is fused with the pelvic girdle.
\nReason (R): The synsacrum provides a rigid framework for perching.
\nAns. (c)<\/div>\n
13. Assertion (A): The accidental leak of methyl isocyanate from a storage tank of a factory in Bhopal in 1980 killed more than 25, 000 people.
\nReason (R): In the factory, the safety scrubber chimneys, filled with the detoxifying solution failed to function.
\nAns. (c)<\/div>\n
14. Assertion (A): After removal of parathyroids in lizards the blood calcium level rises rapidly.
\nReason (R): Parathyroids regulate the level of calcium in blood.
\nAns. (d)<\/div>\n
15. Assertion (A): Linoleic acid and linolenic acid are essential polyunsaturated fatty acids.
\nReason (R): Linoleic acid and linolenic acid are biosynthesized in human beings.
\nAns. (c)<\/div>\n
16. Assertion (A): As a fuel, coal releases two-thirds more carbon dioxide per unit of energy than floes gasoline.
\nReason (R): Coal is largely carbon, whereas gaso-line contains more hydrogen.
\nAns. (a)<\/div>\n
17. Assertion (A): In pearl oyster, it is the necre, which forms the pearl.
\nReason (R): Necre is secreted continuously by the edge of the mantle.
\nAns. (b)<\/div>\n
18. Assertion (A): Queen bee after mating produces both fertilized and unfertilized eggs.
\nReason (R): Fertilized eggs produce queen and drones (males), whereas unfertilized eggs are eaten up. by the workers.
\nAns. (c)<\/div>\n
19. Assertion (A): Puffs in the polytene chromosomes are the sites of gene transcription.
\nReason (R): DNA unfolds into open loop to facilitate RNA synthesis in the puff.
\nAns. (a)<\/div>\n
20. Assertion (A): Enlargement of spleen in a malarial patient is due to hemorrhage of arteries.
\nReason (R): Infective states of Plasmodium are responsible for causing excessive proliferation of erythrocytes.
\nAns. (d)<\/div>\n
21. Assertion (A): Miracidium larva of Fasciola is endowed with cilia, penetration gland and apical gland.
\nReason (R): The structure of miracidium is best adapted to penetrate into the liver and gall-bladder of sheep.
\nAns. (c)<\/div>\n
22. Assertion (A): A cell placed in an isotonic solution shows no change in size or volume.
\nReason (R): Isotonic solutions have the same chemical composition as the cell cytoplasm.
\nAns. (c)<\/div>\n
23. Assertion (A): Cardiac muscle cells contain much large amounts of RNA than pancreatic cells.
\nReason (R): High-protein-producing cells contain larger amount of RNA in comparison to low protein producing cells.
\nAns. (d)<\/div>\n
24. Assertion (A): Responses mediated by peptide hormones such as insulin are relatively slow.
\nReason (R): The polypeptide hormones are rapidly removed from the blood by hydrolytic enzymes.
\nAns. (c)<\/div>\n
25. Assertion (A): Myoglobin bears an iron-containing haem group capable of combining reversibly with oxygen.
\nReason (R): Myoglobin is made up of a monomeric polypeptide chain without a tertiary structure.
\nAns. (c)<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

(a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but l. is not a correct explanation of A (c) A is true but R is false (d) A is false but R is true 1. Assertion (A): The degeneration of tadpole tail […]<\/p>\n","protected":false},"author":2,"featured_media":53329,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[12,14],"tags":[],"class_list":["post-40733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gk","category-neet","cat-12-id","cat-14-id","has_thumb"],"yoast_head":"\nobjective type multiple choice assertion-reason type questions from Biology - Gyankatta<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/news.gyankatta.org\/?p=40733\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"objective type multiple choice assertion-reason type questions from Biology - Gyankatta\" \/>\n<meta property=\"og:description\" content=\"(a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but l. is not a correct explanation of A (c) A is true but R is false (d) A is false but R is true 1. 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