During initiation of protein synthesis,  A. methionyl-tRNA appears at the A site of the 80S initiation complex. B. eIF3 and the 40S ribosomal subunit participate in forming a preinitiation complex . C. eIF2 is phosphorylated by GTP . D. the same methionyl-tRNA is used as is used during elongation . E. a complex of mRNA, 60S ribosomal subunit, and certain initiation factors is formed.

Q: Another name for the RNA polymerase recognition/binding site upstream of a gene is the O a. promoter…

A: Introduction :  In transcription process RNA polymerase binds to the DNA upstream of the gene at a…

Q: Okazaki fragments are short DNA pieces that explain how

A:

Q: Question 1: tRNA and amino acyl tRNA synthetases Part g: What chemical and structural characters are…

A: Part g: There are several chemical and structural similarities between the amino acids Ile…

Q: -up) genes, which Question #1: The diagram below depicts the regulatory regions for contain…

A: The gene has cis-regulatory sequences, to which the transcription factors bind and will control the…

Q: QUESTION 10 The image below represents a stage in the translation elongation cycle. H2N A) What has…

A: Protein synthesis:  It is mediated by ribosome -peptide formation between amino acids. In protein…

Q: Amino acids are covalently attached at site 3'A and A-OH MRNA binds to site ES А. В, С

A: Amino acids are the building blocks of proteins. Amino acids are linked by peptide bonds to form a…

Q: QUESTION 9 After formation of the preinitiation complex in eukaryotes, transcription begins after:…

A: C is correct because RNA polymerase holoenzyme is made up of sigma factor along with RNA Polymerase,…

Q: The eukaryotic transcription factor that exhibits a sequence specificity for the TATA box is: A)…

A: Transcription is the first step in the gene expression which transfers the genetic information…

Q: Question 3. It is not necessary to take precautions against shearing RNA during the purification…

A: RNA molecules are more prone to shearing than DNA due to their single stranded nature & smaller…

Q: Question 10 The adapter molecule that interacts specifically with both nucleic acids and amino acids…

A: Introduction :- Nucleic acids are biopolymers, or macromolecules, that are required for all living…

Q: QUESTION NO. 1 Base excision repair A. is used only for bases that have been deaminated. B. uses…

A: Base excision repair (BER) corrects lesions in the base that don't significantly distort the DNA…

Q: During elongation, TRNA binds initially to the A "P" site on the ribosome. B any available site on…

A: tRNA also called the transfer RNA and is an adaptor molecule. tRNA molecule at as a link between…

Q: Queștion 1: The protein Collagen alpha-1 has 1671 amino acids. From start to stop codon, how long…

A:

Q: Eukaryotic mRNAs encode protein(s) and most prokaryotic MRNAS encode protein(s). а. multiple,…

A: mRNA is the transcribed molecule using DNA as a template. In prokaryotes, mRNA is transcribed in the…

Q: Review translation. Match the term and its description. Each term can only be used once. transfer…

A: Hi, Thanks For Your Question.   transfer amino acids to the growing polypeptide in a ribosome…

Q: Each tRNA has unique identity elements recognized by its specific enzyme involved in charging it…

A: Proteins are polymers of amino acids that are linked by the peptide bond. Each amino acid in the…

Q: Question 9 Expression of genes independently of regulation is termed: A repressible regulation. B…

A: Genes are the functional segments of DNA. They encode for proteins which are the ultimate players of…

Q: Question 29 Expression of genes independently of regulation is termed: A constitutive expression. (B…

A: Ans 29  - the correct answer of the above question is B) AUTOREGULATION. Expression of genes…

Q: Question 2. Ribosomes are cellular structures that are composed of protein and RNA; this structure…

A: Ribosomes are small structures found in all living cells that are responsible for protein synthesis.…

Q: In prokaryotes, the sigma factor recognizes base sequences in the . which facilitates RNA polymerase…

A: The major step of initiation of RNA synthesis is the facilitation of RNA polymerase binding. This is…

Q: When MRNAS are edited to become mature mRNA, the nonsense regions that are removed are called and…

A: Ribonucleic acid (RNA) is a significant organic macromolecule that is available in all natural…

Q: Why are host cell antiviral responses that target double-stranded RNA effective against single-…

A: The host cell's antivirus response against RNA viruses target enzymes used by RNA virusesto stop…

Q: Question 30 Which of the following does not require GTP hydrolysis? A all of the above require GTP…

A: Answer--- correct option is (A) All of the above require GTP hydrolysis

Q: Question 29 A DNA sequence is transcribed in both males and females, but only translated in males.…

A: Transcription is the process by which genetic information stored in DNA is converted into RNA. It…

Q: Queștion 2: The protein Collagen alpha-1 has 1671 amino acids. How many codons must have been read…

A: Proteins are made up of long sequences of amino acid-building components. The sequence of the amino…

Q: All are stages in transcription EXCEPT: A chain termination. B DNase I activity on RNA…

A: Transcription is the process of conversion of RNA to proteins. It involves 3 steps initiation…

Q: Question 1 A new receptor has been discovered in the cells of the human liver. The following…

A: A protein called mitochondrial antiviral-signaling protein (MAVS) is required for innate antiviral…

Q: Choose best match of the events that occur during translation with their locations in the E. coli…

A: Translation is the process by which the genetic code on messenger RNA (mRNA) molecules is decoded to…

Q: The presence of lactose in E.coli triggers the transcription of Lactose Operon. O True O False

A: Operons can be defined as the gene regulatory system present in a prokaryotic organism. Operons…

Q: QUESTION 19 The role of primase at the replication fork is to... O A. decatenate (unknot) DNA B. O…

A: Replication is the process of making of daughter DNA from the parental DNA.

Q: QUESTION 12 Which of the following is NOT a step in the formation of LTRS? A. Binding of a tRNA…

A: Introduction LTR is A polynucleotide sequence found at each end of an integrated retrovirus genome…

Q: Question 5. What is the effect on a target mRNA when it is silenced by a miRNA that has a complete…

A: Protein synthesis is one complex procedure taken up by the cell and that needs various components to…

Q: Question 40 Which of the following is not a key step in the activation of MRNA synthesis in…

A: Ans- In eukaryotes, mRNA is synthesized in the nucleus during transcription in which the single DNA…

Q: QUESTION 46 Vancomycin and B-lactam antibiotics are similar in what way? OA. They both prevent…

A: Vancomycin and Beta-lactam are two classes of antibiotics that are used to treat bacterial…

Q: Question 2. Bacteria are grown in a medium containing 15NH₂Cl for a number of generations so that…

A: The give case in the question belongs to experiment conducted by Meselson and Stahl who demonstrated…

Q: QUESTION 3 Methyl groups are added to histones by. O A. histone deacetylases B. histone methyl…

A: Histones belong to a family of basic protein which relates with DNA present inside the nucleus  and…

Q: Which form of RNA acts as a blueprint for polypeptide biosynthesis by the ribosome? O a. FRNA O b.…

A: Messenger RNA (mRNA) is a type of RNA that transports the protein blueprint from a cell's DNA to its…

Q: Which type of molecule binds at the core promoter sites in association with RNA polymerase? A…

A: RNA polymerase can attach to the polymer by only one method. This method involves binding of Basal.…

Q: QUESTION 21 Observation of purified DNA as "beads on a string" first indicated the presence of: а.…

A: DNA is considered as the genetic material, which helps to control all the functions of the cell. In…

Q: You are doing a genetic engineering experiment. You use restrictions enzymes to cut the regulatory…

A: Jacob and Monod (1961) first described the lac operon, which codes for the cellular machinery that…

Q: Question #3: CRISPR has been used to cure an individual from sickle cell. Below is a Sanger…

A: CRISPR/Cas9 technology is used to edits genes by precisely cutting DNA and then letting natural DNA…

Q: QUESTION 22 Ribosomal RNA: O a. none of the above O b. acts only as a structural scaffold O C.…

A: The cell exhibits genetic material in the form of DNA as well as RNA.

Nitrogen metabolism

Nitrogen metabolism is the synthesis, utilization or uptake, breakdown, and excretion of nitrogenous compounds in the body. The nitrogen metabolism encompasses nitrogen fixation, biosynthesis, and the breakdown of amino acids, purines, and pyrimidine. Since nitrogen-containing compounds are required for various life processes, nitrogen is an important element of life.