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: Question 17 What is the nucleotide sequence of the DNA strand that is complementary to…

A: The hereditary substance in humans and almost all other animals is DNA, or deoxyribonucleic acid.…

Q: Question 17 The initial step in the formation of an aminoacyl-TRNA is A interaction of the MRNA with…

A: Aminoacyl-tRNA An enzyme called aminoacyl-tRNA synthetase which helps in attaching the amino acid…

Q: QUESTION 23 Which of the following statements about RNA structure is FALSE? O A. A sequence in a…

A: RNA, an abbreviation of ribonucleic acid, complex compound of high molecular weight that functions…

Q: Question 17 What is the nucleotide sequence of the DNA strand that is complementary to…

A: Answer- Option D. 5' TAGTGACAGTTGCGAT 3¹

Q: QUESTION NO. 1  Patients with the rare genetic disease xeroderma pigmentosum (XP) are very…

A: Nucleotide excision repair (NER) is the main pathway used by mammals to remove bulky DNA lesions as…

Q: QUESTION 4 In order to produce mRNA vaccine for COVID19, the DNA encoding the SARS-CoV-2 spike…

A: Designing a primer for amplification of target DNA is an important aspect of primer designing.…

Q: Question 8 Modification of histone proteins include the following EXCEPT A phosphorylation of serine…

A: Histones are highly basic proteins that compress DNA within the nucleus to produce chromatin, which…

Q: The DNA sequences that are most conserved between human and mouse would most likely be located in:…

A: Repetitive DNA are moderately-repeated DNA sequences while Satellite DNA are highly-repeated, short…

Q: QUESTION NO. 1  Fragile X syndrome is a common form of inherited mental retardation. The mutation in…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Question 8 The unique stem-loop structures of the transfer RNA helps the RNA perform its function of…

A: tRNA (Transfer ribonucleic acid) is one type of RNA that is used in translation machineri to decode…

Q: During fruit fly development, a transmembrane protein called Delta on the surfaces of presumptive…

A: Cell signalling involves the following events: Synthesis of signalling molecules their…

Q: Question 26 transcription activator bound at the activator binding site O Gene is switched ON O Gene…

A: Ans - Transcription activator bound at the activator binding site to switch on the gene.  # These…

Q: Question 37 The mRNA must contain the following to allow for initiation of protein synthesis in E.…

A: Translation is defined as the synthesis of protein from the mRNA. It takes place in the cytoplasm.

Q: QUESTION 12 The leucine zipper domain of transcription factors is not involved in DNA recognition…

A: Leucine zipper is formed by the dimerization of two specific alpha helix monomers bound to DNA.…

Q: During lagging strand synthesis of DNA,  Okazaki fragments are linked together by ___________.   a…

A: During the synthesis of DNA, at each replication fork, two strands of  DNA are synthesized one is…

Q: Where does transcription occur in eukaryotic cells?   a in the nucleus   b in the cytoplasm   c…

A: Transcription is the first step in protein synthesis and this process is responsible for mRNA…

Q: QUESTION 22 If polynucleotide phosphorylase (PNP) synthesizes random RNA when given a 50-50 mixture…

A: Codons are trinucleotide bases of DNA or RNA that code for specific amino acids. There are 64 codons…

Q: tRNA exits the ribosome at the _______________ site.

A: Transfer RNA is involved in protein synthesis as it brings specific amino acid to the correct…

Q: Charged tRNA enter the ribosome at the _____________ site.     E     P     A     X

A: tRNA is a type of molecule that is involved in the translation process of a messenger RNA (mRNA)…

Q: Question 33 RNA polymerase II: A is located in the nucleoplasm and transcribes the protein-encoding…

A: Transcription is the process which is required for formation of mRNA from template strand of DNA.

Q: Question 16 All of these can be gene products except A tRNA B proteins (c) dsDNA D) FRNA E) MRNA

A: A gene product is the biological substance produced by the expression of a gene, which might be RNA…

Q: QUESTION NUMBER: 23 Transcription of the zygote nucleus is dispensable in Drosophila early…

A: As insects are globally distributed and have ecological relevance, the ability to extrapolate…

Q: Question 15 The higher protein abundance observed in the ACE20E allele compared to the wild- type…

A: Introduction  The expression of genes is highly regulated in both prokaryotes as well as in…

Q: QUESTION 4 When mRNAs are edited to remove nonsense regions, this is called and it happens in the O…

A: The central dogma defines the flow of genetic information from DNA to the proteins. DNA strands are…

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 16 The mechanism of activation of eukaryotic genes involves addition and removal of…

A: Gene is a stretch of RNA that encodes a functional product either in the form of RNA or a protein.…

Q: Question Number 3: Write the sequence of the mRNA molecule synthesized from a DNA template coding…

A: Transcription is the process of synthesizing the mRNA from the template strand of DNA.

Q: Question 11 The triplet code allows many amino acids to be specified by more than one codon. Such a…

A: Introduction :- Amino acids are the building blocks of proteins. The building blocks of life are…

Q: QUESTION 37 When treated wth AZT, a population of HIV wil inevitably evolve trom aimost all…

A: The enzyme reverse transcriptase (RT) catalyses reverse transcription of the viral RNA genome into…

Q: QUESTION 17 You have engineered a new mutation that removes the UAS sequence upstream of the GAL7…

A: 17. If upstream sequence UAS is removed then gal 4 the positive transcription regulator of gal7 can…

Q: Identify the best match between the mutation description and term.

A: As we know that there are 20 amino acids and the total codon are 64 of which 3 are stop codon. So we…

Q: QUESTION 1 Human ribosomes can translate the SARS-COV2 genome because: O it is reverse transcribed…

A: COVID 19 (Coronavirus disease 2019) is a pandemic disease that is caused by air-borne Severe acute…

Q: QUESTION 1 You are studying a mutant strain of e.coli. When you add lactose to the media of this…

A: Lac operon is the segment of DNA which is involved in the breaking down of lactose into glucose in…

Q: Question 21 Transcription of a typical gene encoding a polypeptide in eukaryotes involves all of the…

A: Transcription is the process that occurs in nucleus of a cell that involves the Synthesis of mRNA…

Q: QUESTION NO. 1  Antisense nucleic acids   A. complementary to mRNA would enhance translation . B.…

A: Replication is considered as a process, in which new strand is synthesized over the template strand.…

Q: Question 41 The helical turns of the DNA does not only provide spaces for binding with regulatory…

A: Deoxyribonucleic acid (DNA) is a molecule made up of two nucleotide bases that coil around one…

Q: QUESTION NO. 1 Antisense nucleic acids A. complementary to mRNA would enhance translation . B.…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Question 7: Peptide nucleic acids (PNAS) exhibit greater stability as heteroduplexes with DNA (ie…

A: PNA peptide nucleic acid is the artificial Nucleic acid structurally similar to nucleic acid.

Q: A transition mutation A. occurs when a purine is substituted for a pyrimidine or vice versa. B.…

A: Since there are multiple questions, we will be answering the first one for you. If you want answer…

Q: Question 9 Ribosomes can initiate translation by starting at any one of the three possible reading…

A: Introduction :- Translation is the process of synthesis of Protiens , during the expression of genes…

Q: QUESTION NO. 1  Cystic fibrosis is a frequent generic disease of Caucasians. The CF gene codes for a…

A: Chaperones are a group of proteins that have functional similarity and help in protein folding. They…

Q: GENETICS - help me please

A: The lac operon of E. coli contains genes concerned with lactose metabolism. It's expressed only if…

Q: Question 10. Which of the following mutations is likely to be the least harmful? A. A +1 frameshift…

A: Mutations. The mutations cause the shift or change of the genetic reading frame of codons resulting…

Q: Question 16 The fact that some eukaryotic FRNAS are self-splicing indicates that (A RNA can contain…

A: Introduction: Introduction: Nucleus is main controller of the cell which possess genetic information…

Q: QUESTION 19 Place the following steps in the expression of the lac operon in the order in which each…

A: Lac operon is found in E coli and many other gastrointestinal bacteria  It is important for the…

Q: QUESTION 38 The following is a template strand of DNA: 3' - ATAGCGTACAAGTGGATT - 5'. Imagine, for a…

A: The process of formation of complementary RNA sequence from codes of template DNA is known as…

Q: QUESTION 29 If the image below is an electron micrograph showing the result of an experiment in…

A: DNA => transcription => mRNA => translation => Protein. Enzyme used for transcription -…

Q: Question 10. Where do regulatory transcription factors bind relative to a gene sequence?

A: Transcription factors are proteins that play a role in the process of converting DNA to RNA.…

Q: Question 1 The creation of milk products such as cheeses and yogurts is dependent on the conversion…

A: Positive transcriptional control requires an activator protein to stimulate transcription at the…

Q: Question 19 Listen Aminoacyl-tRNA synthase recognizes their specific amino acid by and A ; they…

A: Aminoacyl tRNA synthase is also known as tRNA ligase.  It loads or charge the tRNA with specific…

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.