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Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
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- Reverse transcriptase assembles an ________ on an _______ template. a. mRNA; DNA c. DNA; ribosome b. cDNA; mRNA d. protein; mRNABacteriophage Lytic Replication Cycle Below steps in the lytic cycle of bacteriophage have been arranged in random order and with letter labels. a. assembly b.biosynthesis C. entry d. release e. attachment/adsorption From the choices below, choose the correct sequence of steps in lytic replication O e, c, d,a, b O d, e, a, b, c Oe,c, b, a, d O a, b, c,d,eBacteriophage-viruses infect Select one: O a. Virus O b. Prokaryotes C. Bacteria O d. DNA Clear my choice erials Jump to...
- slation is synthesis of proteins from B. C. D. t-RNA m-RNA r-RNA DNA 41. It is a type of mutation which modifies the whole sequence of the amino acids. A. В. C. D. 42. Which of the following is a result of a genetic mutation? Inversion Additions Substitutions Replication A. Kwashiorkor Scurvy Cystic Fibrosis Marasmus В. С. D. 43. Which of the following medical condition is a result of a substitution mutation? A. Sickle cell anemia B. Tay-sach's disease C. Cystic Fibrosis D. Some Cancer 44. Lung cancer is caused by which of the following factors? A. В. Addition Inversion Substitution Polycyclic Aromatic Hydrocarbons С. D. 45. Which of the following are called mutagens А. Chemicals that induce changes in DNA В. Chemicals that induce changes in Proteins. C. Chemicals that induce changes in Carbohydrates. D. Chemicals that induce changes in Lipids. 46. Glycolyis is under of the following metabolic pathway? Chain reaction Chemical reaction Anabolic reaction Catabolic reaction А. В. С. D.…7. Replication factor C plays which of the following roles in eukaryotic DNA replication?A. the sliding clampB. the clamp loaderC. the DNA ligaseD. a single-stranded DNA binding proteinE. a cofactor required for activating the DNA polymerase 8. Phages that program the host cell for continued particle releasing without killing the cell are called ____________ phages.A. lyticB. lysogenicC. temperateD. chronicE. none of the above 9. Retroviruses use _______ to make a DNA copy of their RNA genome.A. restriction enzymesB. DNA polymerase IC. RNA polymerase IID. reverse transferaseE. reverse transcriptase13. In bacteria, mismatch repair involves:A. DNA glycosylase/lyaseB. AP endonucleaseC. RecA and LexA proteinsD. MutS, MutL and MutH proteinsE. UvrABC proteins 14. _______ involves an exchange of DNA between two interacting DNA molecules.A. TransferenceB. TranspositionC. Crossing overD. InductionE. None of the above 15. The bacterial core polymerase has two functions: 5' to 3' polymerase activity and _________________ activity.A. 5' to 3' exonucleaseB. 3' to 5' polymerase C. 3' to 5' exonuclease D. topoisomeraseE. none of the above
- D. radiodurans can survive strong ionizing radiation (gamma radiation). What DNA repair process? a. Reverse transcription b. Translation c. Homologous recombination d. DNA replication e. Transcription3 E D C The arrow in the diagram below indicates the direction of movement of the replication fork. 5' S R F Q Search Which letter indicates a strand that is synthesized discontinuously? OA Ов ос V A F5 T C G B F6 T 6 Replication B LDL Y F7 H & 7 WALLS U N F8 * 00 99+ 8 J₁ F9 kirimmi MO 35 Alt מם E K 2 F10 L P < F12 10:05 AM 4/8/2023 Ctrl 10 BThe plasmid (episome) F factor mediates which of the following? a. Transduction b. Transformation c. Conjugation d. Replication e. Translocation
- Match the terms with their most suitable description. ___ methanogen a. component of bacterial cell wall ___ nucleoid b. has RNA genome, protein coat ___ retrovirus c. halts cell wall formation ___ plasmid d.releases methane gas ___ extreme e. region with DNA halophile ___ peptidoglycan f. circle of nonchromosomal DNA ___ penicillin g. salt lover1. DNA coding strand: CCC TCA ATC GAG AAA GGT DNA template strand: MRNA: Peptide chain: 2. DNA coding strand: ATG GCC TGG ACT TCA GGT DNA template strand: MRNA: Peptide chain: 3. DNA coding strand: GGG TGA GCT TTC CCG TTA DNA template strand: MRNA: Peptide chain: 4. DNA coding strand: TẠC TAT GCC TTA ACC CAT DNA template strand: MRNA: Peptide chain: 5. DNA coding strand: TÁC ACC GTT ATC GGG CTA DNA template strand: mRNA: Peptide chain:Transfer of F factor via bacterial conjugation uses a molecular mechanism related to: a. Transcription b. Telomere replication c. Theta replication d. Rolling circle replication e. None of these is correc