BIOMOLECULESPlease answer the questions properly.- Multiple choice1. Analyze the following and identify which onementions the function of a common eukaryotic ligase?A. Convert pyruvate into acetyl-coenzyme AB. Transfer amino groups from an amino acid to analpha-keto acidC. Join lagging strands (Okazaki fragments) of DNAduring replicationD. Catalyze the conversion of glucose-6-phosphate intofructose-6-phosphate1. The coenzyme biocytin is associated with which ofthe following vitamins?A. nicotinic acidB. pyridoxineC. thiamineD. biotin

Ligase enzymes are enzymes of Enzyme classification class 6 and it catalyzes the formation of C-C,…

Answered: 1. Analyze the following and identify…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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MULTIPLE CHOICE - Please answer properly QUESTION : Which of the following functions describes the enzyme Peptidase? A. remove phosphate from a substrate B. removal of H2O C. cleave phosphodiester bond D. cleave amino bonds
Choose the correct option for following three mcqs 7.The first step in the capping reaction is catalyzed by: Phosphatase Guanylyl transferase Methyl transferase Kinase None of the above 8.Which of the following statements about tRNAs is FALSE? They contain an anti-codon loop They contain several modified bases Their secondary structure looks like a cloverleaf They are generally less then 100 nucleotides in length They are synthesized by RNA polymerase-II 9.During protein synthesis _____ delivers the charged tRNA to the A-site. EF-Tu EF-G eIF-2 RF1 RF2
Suggest a reasonable strategy for the specific phosphorylation of the5’ –OH group of a nucleoside.
Fill in the blanks (write answers only in correct sequence). When the activation energy required is less between the reactants and the products, reaction is known as----- i. ii. The region of an enzyme where substrate molecules bind and undergo a chemical 11. reaction is known as--- 11. To produce amino acids and synthesis of NADH, cycle used is-- Metabolic cycle that takes place both in cytoplasm and mitochondria is--- Glucose 1 phosphate is converted to Glucose 6 Phosphate by the action of - Which vitamin deficiency is linked with the night blindness? Name it iv. V. vi.
Anabolism & Catabolism of Nitrogenous Bases. a. Differentiate the processes of purine nucleotide biosynthesis & pyrimidine nucleotide biosynthesis. What are the starting materials for each process? b. Differentiate the processes of purine nucleotide degradation &pyrimidine nucleotide degradation. What are the end products of each process? c. Explain how purine & pyrimidine biosynthesis is regulated to produce balanced levels ofall four nucleotides (ATP, GTP, UTP & CTP)?
. Explain why DNA is stable in the presence of alkali (0.3 M KOH), while RNA is quantitatively degraded to 2'- and 3'-nucleoside monophosphates under these conditions.
TRUE OR FALSE 1. The RNA molecules could be found in the nucleoplasm 2. The cyclobutane pyrimidine dimers are associated with CG to AT mutations 3. The nucleotides are joined by phosphodiester bonds 4. The mRNA carries the amino acids for elongation in protein synthesis 5. The DNA is present in the mitochondria 6. A blue coloration in Bial’s test indicates the presence of pentoses 7. Sodium hydroxide is the hydrolyzing agent in ammonium molybdate test 8. A black precipitate forms when a purine reacts with silver ions 9. Hydrolysis is the breaking of a bond in a molecule using water 10. The phosphate backbone is the site of cleavage during the DNA hydrolysis
Cell wall bullding block D-Ala-D-Alal-Lys-tail NH,Me Heptapeptide backbone R1 R. R2 ii) With the aid of the figure above showing the important features of the binding of Vancomycin (lower part) to a bacterial cell wall peptia discuss the antibiotic effect of Vancomycin. i) Vancomycin resistant strains often have a mutation in which one of the D-Ala moieties is exchanged to a D-lactate moiety. Discuss why this mutation makes the strain Vancomycin- resistant but still viable. iv) Glycoconjugate vaccines based on bacterial capsular polysaccharides have been used for 30 years without any need for changes in their structures, while the flu vaccine, based on attenuated or killed virus particles, requires many different structures and a check each time when there is an epidemic that the right vaccine is used. Discuss the reason behind this.
VI - BIOMOLECULES Instructions : - Answer the question properly. - Please do not copy here in Bartleby - Explain why did you choose that answer in 3-5 sentences. QUESTION : 1. Which of the following enzyme is responsible for the regulation of biological nitrogen fixation? A. Dinitrogenase reductase B. Dinitrogenase oxidase C. Phosphatase D. Kinase
BIOMOLECULES - Please answer the questions properly. - Multiple choice 1. In human beings, what is the major control of de novo pyrimidine nucleotide synthesis? A. substrate availability B. feedback inhibition of glutamine-PRPP amidotransferase C. competitive inhibition of carbamoyl phosphate synthetase II D. availability of N-acetyl glutamate 2. In patients with Lesch Nyhan Syndrome, purine nucleotides are overproduced and over excreted. The hypoxanthine analogue Allopurinol, which effectively treats gout , has no effect on the severe neurological symptoms of Lesch- Nyhan patients because it does not? A. decrease de novo pyrimidine synthesis B. increase PRPP levels (Phosphoribosyl pyrophosphate) C. Decrease urate synthesis D. decrease de novo purine synthesis
are key p of this bou. and lucleohole Nucleic Acids genetic infromating 2. RAlA 2. 4. Enzymes control the rates at which the chemical reactions in a cell take place. A. Define the following terms: 1. catalyst: 2. enzyme: 3. substrate: 4. active site: 5. energy of activation: B. Use all of the above terms to describe how enzymes work in a few sentences:
4A. Write out the chemical equations (structures are not necessary) for the two steps in the reaction catalyzed by aminoacyl tRNA transferase. Include all products and reactants. Step 1: amino acid activation Step 2: aminoacyl transfer to the tRNA 4B. Write the chemical equation for the net reaction catalyzed by aminoacyl transferase. This can be determined by taking the sum of the two reactions above.

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