Which of the following statements about peptidoglycan (PG) synthesis are CORRECT? a) Ribosomes in the periplasm...
Which of the following statements about peptidoglycan (PG) synthesis are CORRECT?
a) Ribosomes in the periplasm mediate the formation of the final peptide bond which X-links the glycan chains.
b) Individual sugars and amino acids are taken from the environment and added to the expanding peptidoglycan in the periplasm.
c) Partial degradation of peptidoglycan precedes new synthesis.
d) Two of the above.
e) All of the above.
Homework Answers
e) All of the above
All the statement mentioned are correct
enzyme transpeptidase links the two peptide chains to form final peptidoglycan
Add Answer to:
Which of the following statements about peptidoglycan (PG)
synthesis are CORRECT?
a) Ribosomes in the periplasm...
Which of the following is not an essential function of ribosomes in all domains of life?...
Which of the following is not an essential function of ribosomes in all domains of life? A. Catalyze peptide bond formation between amino acids during polypeptide formation. B. Bind messenger RNA and identify the start codon where translation begins. C. Facilitate the complementary base pairing of mRNA codons and tRNA anticodons that determines amino acid order in the polypeptide. D. Align the Shine Delgarno sequence in the mRNA with a complementary sequence in the 16S rRNA of the small ribosomal...
02 2. Which of the following statements about protein LO synthesis is true? a. Protein synthesis...
02 2. Which of the following statements about protein LO synthesis is true? a. Protein synthesis occurs in the nucleus of the cell. b. Messenger RNA carries amino acids to ribosomes for assembly into proteins. c. In the process of transcription, transfer RNA trans- d. None of the above is true fers its DNA onto a ribosome.
1Plants can create new organs.................................................................. at seedling stage at vegetative stage at spring time at summer...
1Plants can create new organs.................................................................. at seedling stage at vegetative stage at spring time at summer time all of the above 2.One of the compound below is NOT a primary product of photosynthesis.... A. Starch B. Sucrose C. Triose phosphate D. Glucose E. Phosphoglyceric acid (PGA) 3.Which chemical groups from a pair of amino acids must react to form a peptide bond? A. the two R-groups or sidechains B. the two carboxyls C. the two alpha carbons D. the amino...
Which of the following statements about protein structure is NOT correct? Why are proteins able to...
Which of the following statements about protein structure is NOT correct? Why are proteins able to buffer physiologic solutions over a wide range of pH? They contain many functional groups with different pK's They are macromolecules of high molecular weight They have many peptide bonds which are very resistant to hydrolysis by hydrogen or hydroxyl ions They have considerable secondary and tertiary structure which cause hydrogen ions to be sequestered The side chains of the amino acids with acidic functional...
Then, bubble in the correct answers 1. During protein synthesis ribosomes move along! A. tRNA B....
Then, bubble in the correct answers 1. During protein synthesis ribosomes move along! A. tRNA B. histons C. Plasmids D. mRNA 2. Constitutive genes are transcribed: A. Sometimes B. Constantly C. Depending on the environmental factors D. Never 3. The most serious type of mutation is a mutation. A. point B. silent C. frameshift D. back 4. Base pairs in DNA are held together by bonds. A. Peptide B. Non-polar covalent C. Polar covalent D. Hydrogen 5. The expression of...
7. In bacteria the elongation stage of protein synthesis does not involve: A) aminoacyl-tRNAS B) EF-Tu...
7. In bacteria the elongation stage of protein synthesis does not involve: A) aminoacyl-tRNAS B) EF-Tu C) GTP D) IF-2 E) peptidyl transferase Which of the following best describes the cholesterol molecule? A) Amphipathic B) Nonpolar, charged C) Nonpolar, uncharged D) Polar, charged E) Polar, uncharged The enzyme that attaches an amino acid to a tRNA (aminoacyl-tRNA synthetase): A) always recognizes only one specific tRNA. B) attaches a specific amino acid to any available tRNA species. C) attaches the amino...
1.What element in prokaryotic mRNAs directs the ribosome to the initiation codon? TATA box Promoter Pribnow...
1.What element in prokaryotic mRNAs directs the ribosome to the initiation codon? TATA box Promoter Pribnow box Lac Operator Shine-Delgarno sequence 2.The cell envelope of Gram positive bacteria is comprised of: a cytoplasmic membrane, one layer of peptidoglycan and a Lipopolysaccharide (LPS)-containing outer membrane one layer of peptidoglycan peptidoglycan and chitin a cytoplasmic membrane, multiple layers of peptidoglycan and techoic acids LPS only 3.Osmotic lysis of the bacterial cell is prevented by which cell structure? A. Cytoplasmic membrane B. Lipopolysaccharide...
28. Which one of the following statements is true? a) The brain b) Muscle cannot use...
28. Which one of the following statements is true? a) The brain b) Muscle cannot use fatty acids as an energy source. c) The brain exports ketone bodies as fuels for other tissues d) Fatty acids cannot be used as an energy source in humans e) as an energy source, but can use ketone bodies enzymes of the Glyoxylate cycle Heart muscle stores fuel as glycogen. 29. An intermediate found in gluconeogenesis and not in glycolysoxaloacetate a) 2-phosphoglycerate b) phosphoenolpyruvate...
Which of these statements about the composition of membranes is true?
Which of these statements about the composition of membranes is true?A) All biological membranes contain cholesterol.B) Free fatty acids are major components of all membranes. C) The inner and outer membranes of mitochondria have different protein compositions.D) The lipid composition of all membranes of eukaryotic cells is essentially the same.E) The lipid: protein ratio varies from about 1: 4 to 4: 1Membrane proteins:A) ere sometimes covalently attached to lipid moieties:B) are sometimes covalently attached to carbohydrate moieties.C) are composed of...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
02 2. Which of the following statements about protein LO synthesis is true? a. Protein synthesis occurs in the nucleus of the cell. b. Messenger RNA carries amino acids to ribosomes for assembly into proteins. c. In the process of transcription, transfer RNA trans- d. None of the above is true fers its DNA onto a ribosome.
Which of the following statements about protein structure is NOT correct? Why are proteins able to buffer physiologic solutions over a wide range of pH? They contain many functional groups with different pK's They are macromolecules of high molecular weight They have many peptide bonds which are very resistant to hydrolysis by hydrogen or hydroxyl ions They have considerable secondary and tertiary structure which cause hydrogen ions to be sequestered The side chains of the amino acids with acidic functional...
Then, bubble in the correct answers 1. During protein synthesis ribosomes move along! A. tRNA B. histons C. Plasmids D. mRNA 2. Constitutive genes are transcribed: A. Sometimes B. Constantly C. Depending on the environmental factors D. Never 3. The most serious type of mutation is a mutation. A. point B. silent C. frameshift D. back 4. Base pairs in DNA are held together by bonds. A. Peptide B. Non-polar covalent C. Polar covalent D. Hydrogen 5. The expression of...
7. In bacteria the elongation stage of protein synthesis does not involve: A) aminoacyl-tRNAS B) EF-Tu C) GTP D) IF-2 E) peptidyl transferase Which of the following best describes the cholesterol molecule? A) Amphipathic B) Nonpolar, charged C) Nonpolar, uncharged D) Polar, charged E) Polar, uncharged The enzyme that attaches an amino acid to a tRNA (aminoacyl-tRNA synthetase): A) always recognizes only one specific tRNA. B) attaches a specific amino acid to any available tRNA species. C) attaches the amino...
28. Which one of the following statements is true? a) The brain b) Muscle cannot use fatty acids as an energy source. c) The brain exports ketone bodies as fuels for other tissues d) Fatty acids cannot be used as an energy source in humans e) as an energy source, but can use ketone bodies enzymes of the Glyoxylate cycle Heart muscle stores fuel as glycogen. 29. An intermediate found in gluconeogenesis and not in glycolysoxaloacetate a) 2-phosphoglycerate b) phosphoenolpyruvate...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
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