This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 9351. |
Question : Recombination |
| Answer» Solution :(1)Recombination is the phenimenon that is seen during sexual reproduction.(2)The closely linked genes on the same chromosomes do not SEPARATE but tightly linked to each other and hence they do not separate during meitotic crossing over.(3)Such genes are said to show low recobination.THe other types of genes which are not closely linked to each other may easily separate at the time of corossing over and hence are said to show high recobination.(4)These opinions were given morgen when he performed STUDIES of dihybrid cross on drosophila.(5)He CROSSED yellow bodied white eyed female to brown bodied red eyed males.He observed that these two genes do not separate independently and do not yield 9:3:3:1 ratio as EXPLAINED by mendel.(6)The genes for white eye and yellow body are tightly linked with each other and thus show only 1.3% recombination.Whereas white eyes and miniature wings show 37.2% recombination. | |
| 9352. |
Question : Recombination describes |
|
Answer» GENERATION of PARENTAL gene COMBINATIONS |
|
| 9353. |
Question : Recombinant Factor VIII is produced in the ____________ cells of the Chinese Hamster . |
| Answer» Solution :ovarian cells | |
| 9354. |
Question : Recombinant DNA bearing ampicillin resistance gene is passed in E.coli. The latter are spread on agar plates contraining ampicillin. Then |
|
Answer» Both transformed and untransformed cells die |
|
| 9355. |
Question : Recombinant DNA technology is related with: |
|
Answer» STANLEY COHEN and Herberf Boyer |
|
| 9356. |
Question : Recombinant DNA directly injected into the nucleus of the animal cell.a) Microinjectionb) Gene gunc) Using disarmed pathogend) Using plasmid vector |
|
Answer» MICROINJECTION |
|
| 9357. |
Question : Recombinant DNA technology can be accomplished only if we have the following key tools i.e., Restriction enzymes, polymerase enzyme. Ligase and vecors. State the functions of (a) Ligase (b) Restriction enzymes. |
|
Answer» Solution :(a) Ligases: It is anenzyme USED to join the DNA FRAGMENTS. It is a moleular suture or molecular glue or joiningenzyme which is commonly used in rDNA technology (b) RESTRICTION enzyme: Enzymes which cut DNA at specific SITES into fragmentscontaining identifiable genes/It is KNOWN as biological scissors/molecular scissors. |
|
| 9358. |
Question : Recombiant DNA or rDNA technology was discovered by |
|
Answer» Khorana |
|
| 9359. |
Question : Recognize the figure and find out the CORRECT labeling |
|
Answer» a - LINEAR CURVE in geometric growth , B - sigmoid or S - curve in arithmetic growth |
|
| 9360. |
Question :Recognition sequence in EcoRI is : |
|
Answer» GAATTC |
|
| 9361. |
Question : Write a note on recognition sequences or restriction sites. |
| Answer» Solution :(1)Restriction endonucleases cut the DNA fragment at specific site.The site at which there is a cut is called recognition site or restriction site.(2)Restriction endonucleases have the ability to recognize DNA with specific 4 to 8 base pair sequences.RENs CLEAVE these sequences.(3)Every restriction site is identified by a specific restriction endonuclease.(4)At the restriction site both the DNA strands are cut at the same time at these specific p[oints.(5)Most of the restriction stes have palindromic DNA and hence called palindromes. | |
| 9362. |
Question : Recognise the figure and find out thecorrect mathching |
|
Answer» b-light CHAIN c-heay chain ,d-N TERMINAL e-C terminal , a-antigen binding SITE
|
|
| 9363. |
Question : Recognise the figure and find out thecorrectmatching |
|
Answer» a' PRODUCES depressant while 'B' influences cardiovascular SYSTEM
|
|
| 9364. |
Question : Recognise the figure and find out the correct matching. |
|
Answer» a - ARCHAEOPTERYX, B - Tyrannosaurs, C - Stegosaurs, d - Pteranodon
|
|
| 9365. |
Question : Recognise the figure and find out the correct matching |
|
Answer» a-gametocytes,B- SPOROZOITES, C—asexually, b-sexually |
|
| 9366. |
Question : Recognise the figure and find out the correct matching |
|
Answer» |
|
| 9367. |
Question : Recognise the figure and findout the correct matching . |
|
Answer» a-gemethocytes d-sporozoites , C- ASEXUALLY ,b-sexually
|
|
| 9368. |
Question : Recognise the figure and find out the CORRECT matching : |
|
Answer» a-Haplontic LIFE CYCLE , b-diplontic life cycle , C-haplodiplontic life cycle |
|
| 9369. |
Question : Recognise the figure and find out the correct match. |
|
Answer» a-Antheridial BRANCH, b-ARCHEGONIAL branch, C-SPHAGNUM gametophyte. |
|
| 9370. |
Question : Recessive mutations are expressed normally in |
|
Answer» HOMOZYGOUS condition |
|
| 9371. |
Question : Reciprocal cross is |
|
Answer» INTRASPECIFIC hybridization |
|
| 9372. |
Question : Recessive trait is seen due to............ |
|
Answer» |
|
| 9373. |
Question : Recipient of Nobel prize for DNA double helical : |
|
Answer» WATSON and crick |
|
| 9374. |
Question : Recessive epistasis is defined as: |
|
Answer» a situation in whicha gene PAIR in HOMOZYGOUS recessive condition masks the EFFECT of one or both the MEMBER of another gene pair |
|
| 9375. |
Question : Receptor sites for neurotransmitters are present on : |
|
Answer» MEMBRANES of SYNAPTIC vesicles |
|
| 9376. |
Question : Recently, the central governmenthas announced a new coin with which of the denomination in 12-edged polygon shape? |
|
Answer» 20 |
|
| 9377. |
Question : Receptor absent over tongue in |
|
Answer» THERMORECEPTOR |
|
| 9378. |
Question : Recently in January 2019, our Tamil Nadu Government had imposed a ban on using 14 different products of plastic origin. Mention any six plastic products that you know |
| Answer» Solution : (i) Water Packets (ii) PLASTIC straws (III) Plastic carry bags (IV) Thermocol cups (v) Plastic coated paper PLATES (vi) Plastic FLAGS. | |
| 9379. |
Question : Recently discovered anti-cancer drug is obtained from |
|
Answer» TAXUS |
|
| 9380. |
Question : Recently a country held its cabinet meeting under the sea. a. Name the country. b. Why was it done? |
|
Answer» Solution :a. Maldives in Indian ocean. b. To get world.s ATTRACTION about GLOBAL warming and the increase of WATER levels in OCEANS. |
|
| 9381. |
Question : Recent researches suggest that peroxisomes have ……. Origin. |
|
Answer» Cyanobacterial |
|
| 9382. |
Question : Recall the experiments done by Frederick Griffith, Avery, MacLeod and McCarty, where DNA was speculated to be the genetic material. If RNA, instead of DNA was the genetic material, would the heat killed strain of Pneumococcus have transformed the R-strain into virulent strain ? Explain. |
| Answer» SOLUTION :RNA is more labile and PRONE to degradation (owing to the presence of 2. OH group in its ribose). Hence heat-killed S-strain may not have retained its ability to transform the R-strain into virulent FORM if RNA was its genetic material. | |
| 9383. |
Question : Recapitulation theory or Biogenetic law |
|
Answer» Solution :THISTHEORY says that "Ontogeny recapitulates EVOLUTIONARY history. This means an organism repeats its ANCESTRAL history during its development. |
|
| 9384. |
Question : Point out the reasons for Mendel's success. |
|
Answer» Solution :Mendel made wise choice of experimental material he selected pea plant for his EXPERIMENTS fir the following characteristics:(1)Pea plant being a self pollinated plant,it is easy to obtain pure lines for STARTING the BREEDING ecperiments. (2)It is available inquite a numberof true breeding vsrieties (3)Pea plant being an ANNUAL herb,it is eay to cultive and study its several generations WITHIN a short period.Therefore,he was successful in his pea-plant experiments. |
|
| 9385. |
Question : Reason of lung cancer is : |
|
Answer» COAL mining |
|
| 9386. |
Question : Reason of diversity in living being is |
|
Answer» MUTATION |
|
| 9387. |
Question : Rearrange the following levels in their correct organisational sequence: Landscape, Organism, Ecosystem, Population, Biosphere. |
| Answer» Solution :ORGANISM `rarr` POPULATION `rarr ` ECOSYSTEM ` rarr ` Landscape `rarr` Biosphere | |
| 9388. |
Question : Rearrange the following in increasing order of evolution? Gnetales, Ferns, Zosterophyllum, Ginkgo |
| Answer» SOLUTION :`"ZOSTEROPHYLLUM " to "FERNS " to "GINKGO " to "Gnetales."` | |
| 9389. |
Question : Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowering plant embryogenesis, fertilisation, gametogenesis, pollination. |
| Answer» SOLUTION :GAMETOGENESIS, POLLINATION, FERTILISATION, EMBRYOGENESIS. | |
| 9390. |
Question : Rearrange the electron acceptors of cyclic photophos-phorylation in seqential order: 1. Plastocyanin 2. FRS 3. Ferredoxin 4. Cytochrome-f. |
| Answer» Solution :1. FRS 2. Ferredoxin 3. Cytochrome-f (4) Plastocynanin. | |
| 9391. |
Question : Rearrange the descent in human evolution Austrolopithecus rarr Homo erectus rarr Homo sapiens rarr Ramapithecus rarr Homo habilis. |
| Answer» SOLUTION :Ramapithecus`rarr `Austrolopithecus`rarr `Homo habilis`rarr `Homo ERECTUS`rarr `Homo SAPIENS | |
| 9392. |
Question : Rearrange the components of the ecosystem and frame a food chain. Also mention the type of food chain. Hawk, Earthworm, Animal excreta and Black bird. |
| Answer» Solution :Animal EXCRETA `RARR` EARTHWORM `rarr` Black bird `rarr`Hawk. It is a detritus food chain. | |
| 9393. |
Question : Rearing of fish is called poultry. |
|
Answer» |
|
| 9394. |
Question : Reagent used in ELISA test is |
|
Answer» ENDONUCLEASE |
|
| 9395. |
Question : Real product of apiculture is |
|
Answer» Honey |
|
| 9396. |
Question : read the statements w.r.t species. (a) on the basis of taxonomic studies, species is the group of individuals with fundamental similarities. (b) each species have distinct morphological characters than other species. (c) species are group of organisms capable of interbreeding and producing fertile offspring. (d) all species with similarities in morphological features are kept in the same genus and assign to same species epithet |
|
Answer» (B) only |
|
| 9397. |
Question : Read the statements carefully and choose the correct optionA) heat is well adapted to tolerate high temperature. B) Bundle sheath cells of maize seeds are larger thick walled without intercellular space. C) Breakdown of C_4 acid and C_4 pathway occursin bundle seath cells D) C_4 plants shows CO_2 concentration mechanism |
|
Answer» A, B and D are correct |
|
| 9398. |
Question : Read the statements I-V I. They have a special type of leaf anatomy. II. They tolerate higher temperature. III. They show a response to high light insensities IV. They lack photorespiration. V. They have greater productivity of biomass. The above characters are shown by- |
|
Answer» All MONOCOTS |
|
| 9399. |
Question : Read the statements properly and choosen the correct one. |
|
Answer» MANY desert plants have CAM PATHWAY that enables their stomata to REMAIN open during day time. |
|
| 9400. |
Question : Read the statements below and identify the mode of interaction between the species.Sparrow eating seed |
| Answer» SOLUTION :PREDATION | |