mosaic virus is considered to be an open capsid because: A: The capsid uses icosahedral symmetry B: The genome is exposed throughout the capsid C:Protein subunits can be added to expand or reduce

Second Letter EQ#10 G. UU UCU UAU Tyr UGU Cys Phe UUC UCC Ser UCA UGC UGA Stop UGG Trp UAC U UAA UUA Leu UUG Stop UCG UAG CGU CCU CCC CAU His CAC CAA CUU CUC Leu CỦA Pro ССА CCG CGC Arg CGA Gla CAG CGGJ Third CUG) First Letter Letter AAU Asn AAC AGU Ser AGC ACU ACC ACA ACG AUU AUC le AGA Arg AGG A AUA AUG Met AAA Lys AAG GGU GGC GUU GCU GAU GCC Ala GCA GAC Asp GAA Glu GAG GUC Val GUA Gly GGA G 15. Given the following (the start of a very long MRNA sequence), GUG GCG) GGG 5' CCGUAAGAUGGCGAACACAUUGUCAUCCAAUGC.... .... 3' what amino acid sequence would be produced in a cell? 16. If the red "U" in the RNA was changed to an A (due to a DNA mutation, for example), what would be the likely effect on the protein, and how might that alter the protein's function? UCAG UCAG UCAG UCAG 复5 C.

Q7. Meselson and Stahl conducted an experiment to prove that the replication of DNA is semi-conservative (a) Replication of DNA is described as 'semi-conservative'. Explain this term. (b) Explain how the DNA molecule replicates. (c) Meselson and Stahl's experiments involved growing bacteria in culture media containing either heavy nitrogen (15N) or light nitrogen (14N). The DNA was then extracted from the bacteria.

EQ#9 5. For each statement, choose the letter that applies the best: P for prokaryote, E for eukaryote, B for both, N for neither. a. Requires a polyadenylase to complete mRNAs. b. Some segments of a mature mRNA are not encoded in the DNA. c. Have a triphosphate at the 5'end of transcripts. d The 3' end of a transcript follows an AAUAAA sequence. e. Enhancers are found in the transcripts but not in the genes. f. Promoters are found in the genes, but not in transcripts.

12e which genes that are normally found in a lambda genome would be deleted in your lambda vector? briefly explain why those lambda genes are normally delete it from your lambda phage being used as cloning vectors.

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Q2

14

Give correct answer

Q10