Title UBT-4 Solution (27-09-23).pdf ✅

NLI / 2 UBT–4 [Solution] CRACK NEET 2023 /Unit Wise Bio Test Series/ 27-09-2023 SOLUTION PART-1 (SECTION-A) 1. (3) [NEET-2020] • The gene (I) has three allels. • A person will have only two of the three alleles. • When IA and IB are present together, they express won type of sugar. • Allele i does not produce any sugar. 2. (1) [NEET-2015] Multiple alleles are present on different chromosomes 3. (1) [NEET-2019] Numbat, Spotted cuscus, Flying phalanger 4. (4) [NEET-2023,NCERT-II-134] 14 – Pea true breeding variety 3 : 1 – Phenotype ratio 1 : 2 : 1 – Genotype ratio 7 – Pea characters 1 gene – Two alleles 5. (3) [NCERT-II-97] Nucleic acid are two type (DNA, RNA) which is polymer of nucleotide. 6. (2) [NCERT-II-98] During transcription formation of mRNA from DNA templet inside Nucleoplasm. 7. (4) [NCERT-II-112] (AUGC)3 = 64, 61 codon is called sense and 3 non sense codon (UAA, UAG, UGA). 8. (1) [NCERT-II- 97] Guanine is same as cytosin G = 20%, C = 20%. 9. (2) [NCERT-II- 97] In guanine and cytosin 3 hydrogen bond. 10. (1) [NCERT-II- 97] Hydrogen bond is present between nitrogen base A T, G C.   11. (1) [NCERT -II-110] The process in which removal of intron is called splicing. 12. (3) [NCERT-II-77] Genes – One Alleles – Three Phenotype – Four Genotype – Six Co-dominant allele – Two PART-1 (SECTION-A) 1. (3) [NEET-2020] • ‘I’ • • IA IB • 'i' 2. (1) [NEET-2015] 3. (1) [NEET-2023,NCERT-II-134] 4. (4) [NCERT-II-70] 14 – 3 : 1 – 1 : 2 : 1 – 7 – 1 – 5. (3) [NCERT-II- 97] 6. (2) [NCERT-II-98] 7. (4) [NCERT-II-112] 64 8. (1) [NCERT-II- 97] 9. (2) [NCERT-II- 97] 10. (1) [NCERT-II-97] A T, G C.   11. (1) [NCERT -II-110] 12. (3) [NCERT-II-77] – – – – –
NLI / 3 UBT–4 [Solution] CRACK NEET 2023 /Unit Wise Bio Test Series/ 27-09-2023 13. (4) [NCERT-II-112] Genetic code is universal, triplet, commaless and unambigous. 14. (4) [NCERT-II-111] The second complexity is that the primary transcripts contain both the exons and the introns and are non- functional. Hence, it is subjected to a process called splicing where the introns are removed and exons are joined in a defined order. 15. (3) [NCERT -II-116] Jacob and Monad First time explain the gene regu- lation is prokaryotes. 16. (4) [NCERT-II-98] 17. (4) [NCERT -II-110] Transcription takes place in nucleoplasm. 18. (4) [NCERT-ll-108] Promoter and terminator flank the structural gene in a transcriptions unit. 19. (2) [NCERT-II-78] ABO blood group is example of multiple allele. 20. (3) [NCERT-II-97] In RNA the uracil is found at the place of thymine (5-methyl uracil, another chemical name for thym- ine). 21. (2) [NCERT-II-102] Infection, blending, centrifugation 22. (2) [NCERT-II-91] Statement-I is correct but Statement II is incorrect. 23. (4) [NCERT-II- 102 24. (4) [NCERT-II-106] Deoxyribonucleoside triphosphates serve dual pur- poses. In addition to acting as substrates, they pro- vide energy for polymerisation reaction (the two ter- minal phosphates in a deoxynucleoside triphos- phates are high-energy phosphates, same as in case of ATP). 25. (4) [NCERT-II-106] During transcription the site at which RNA poly- merase bind at DNA is called promotors. 13. (4) [NCERT -II-112] 14. (4) [NCERT-II-111] 15. (3) [NCERT -II-116] (1961) 16. (4) [NCERT-II-98] 17. (4) [NCERT -II-110] 18. (4) [NCERT-ll-108] 19. (2) [NCERT-II-78] ABO 20. (3) [NCERT-II-97] 21. (2) [NCERT-II-102] 22. (2) [NCERT-II-91] I II 23. (4) [NCERT-II-102] 24. (4) [NCERT-II-106] 25. (4) [NCERT-II-106]
NLI / 4 UBT–4 [Solution] CRACK NEET 2023 /Unit Wise Bio Test Series/ 27-09-2023 26. (2) [NCERT-II-80] 9 : 3 : 3 : 1 – Phenotype ratio 1:2:1:2:4:2:1:2:1 – Genotype ration 1 – Pure homozygous dominant 4 – Hybrid for both character 6 – Recombinants phenotype 27. (2) [NCERT-II-90] An unaffected carrier female of haemophilia transmits, disease of haemophilia. To some of the male progeny. 28. (4) [NCERT-II-92] Down’s Syndrome : The cause of this genetic disorder is the presence of an additional copy of the chromosome number 21 (trisomy of 21). This disorder was first described by Langdon Down (1866). 29. (2) [NC-II-90] (A) is correct but (R) is not correct 30. (4) [NC-II-75] Both, Statement I and Statement II are correct 31. (3) [NCERT-II-91] -Thalassemia is controlled by a single gene HBB on chromosome 11 of each parent and occurs due to mutations of one or both the gene. 32. (2) [NCERT-II-92] Gynaecomastia is the symptom of Klinefelter syndrome. 33. (1) [NCERT-II-89] 34. (1) [NCERT-II-77] 35. (1) [NCERT-II-86] PART-1 (SECTION-B) 36. (3) [NCERT-II-75] Law of Segregation : This law is based on the fact that the alleles do not show any blending and that both the characters are recovered as such in the F2 generation though one of these is not seen at the F1 stage. Though the parents contain two alleles during gamete formation, the factors or alleles of a pair segregate from each other such that a gamete receives only one of the two factors. Of course, a homozygous parent produces all gametes that are similar while a heterozygous one produces two kinds of gametes each having one allele with equal proportion. 26. (2) [NCERT-II-80] 9 : 3 : 3 : 1 – 1:2:1:2:4:2:1:2:1 – 1 – 4 – 6 – 27. (2) [NCERT -II-90] 28. (4) [NCERT-II-92] 21 29. (2) [NC-II-90] R 30. (4) [NC-II-75] I II 31. (3) [NCERT-II-91] - 32. (2) [NCERT-II-92] 33. (1) [NCERT-II-89] 34. (1) [NCERT-II-77] 35. (1) [NCERT-II-86] PART-1 (SECTION-B) 36. (3) [NCERT-II-75]