Question

41) One codon for threonine i 5. ACU 3. The URNA molecule which threonine molecule will have which sequence in its anticodon e ERNA molecule which furnishes the we a) 3' UGT 5' b) 3' UCA 5. c) 3' ACU 5. d) 3' UGA 5' e) 3' TGA 5 During the replication of DNA, the DNA base sequence S'AGCAT" original strand will generate which of the following sequences on strand? a) 5' ATCAG 3. b) 5 AGCAT 3. c) 5' TCGTA 3. d) 5' UCGUA 3' e) 5' TCOTOS 43) Which of the following statements is true? a) A gene is a section of a DNA molecule which codes for the synthesis of several different proteins. D) An intron is a section of a DNA molecule that codes for proteins. An exon is a section of a DNA molecule that does not code for proteins. In the replication of DNA during cell division, each of the two new cells created has a DNA molecule with one original strand and one strand created during the replication process. e) For each of the twenty amino acids there is only one codon. 44) The synthesis of proteins takes places a) in the nucleus of the cell b) in the mitochondria c) on the DNA molecule d) on the ribosomes e) along a gene 45) Which of the following is a type of mutation? a) Substitution b) Deletion c) Frameshift d) Addition e) All of the above 46) The codon for methionine (Met), which is also the "start" codon, is a) CCU b) AUG c) AUA d) AUU e) UGA Which of the following is one of the "stop" codons? a) UGU b) UGA c) UAC d) CUG e) AUG 47) 48) "Gene regulation" refers to a mechanism by which a) only certain genes are copied when DNA replicates. b) mutations are avoided. c) errors in transcription are avoided. d) genes are expressed only when and where needed. e) ERNA molecules attach to the proper codons on an mRNA molecule.

Answer 1

ANSWERS : 41) The correct option is (d) ie 3 UGA 5'. The anticadon must be complementary to endoms Codon : S'ACU 3. d an had Anticodon : 3 UGA 5'.. Antiendong UGARI rohe 42) the correct option is le, 5'TCGTA 3! The sequence on the new streand must be complementary to the sequence present on eregined strand- Creiginal streand ; 3' AGCAT 5'. New etreand 5' TCGTA 3 pon sish dhe 43) The correct option is colline, In the reeplication of DNA during cell division, each of the two new cells created has a DNA molecule with one original streand and one sheard created during the reeplication process. DNA reeplication is semi - conservative en nature. 42) The correct option is (olie, on the ribosomes. The process of reanslation ( preotein synthesis) ocaves in the cytoplasm , upon the ribosomes. 45. The correct option is (e) ie, all of the above. Various types of mutation in DNA involve substitution addition, deletion, frameshift etc.

as 46) The correct option is (b) ie AUG .. AUG codes fore methionine, as well as acts a streart codon. The correect option is (B) ie, UGA. UAG UGA, URA are the stop codons. 48) The correct option is (d), ie, Gene regulation refers to a mechanism by which genes are expressed only when and where needed ..

As per Chegg guidelines, I'm permissible to answer even only the first question. However, I've provided the answers to all of your questions with explanations. Thanks.