15a) Most amino acid biosynthetic operons in prokaryotes have a structure similar to that observed in the trp operon: a long "leader" region that extends from the 5' end of the transcript to the start codon of the first coding gene, which includes both a "leader polypeptide coding sequence" and an "attenuator" sequence. In the histidine operon, for example, there is a "leader polypeptide coding sequence" that encodes a 16 amino acid peptide; this coding sequence includes 7 histidine codons in a row. What is the purpose to having such a coding sequence in the leader region of the transcript what does the cell gain by producing a polypeptide it will immediately recycle?

Q: QUESTION 8 Which of the following is true of the RAS proto-oncogene? O Mutations involving RAS are…

A: Mutations are alterations in the DNA sequence of an organism. Small changes, such as adding or…

Q: During the ion channel transport, some "gates" open and close. This is in response to which of the…

A: Ion channel transport allows the transportation across the cell membrane for selective sized…

Q: You discover a new gene cluster from a strain of the bacterium Streptomyces. The domains of the…

A: Polyketides(PKs) and non-ribosomal peptide hybrids(NRPS) are important class of natural products,…

Q: 30 29 27 26 25 24 23 21 22 20 19 18 17 16 1 15

A: From the mouth to the anus, the digestive system is made up of a collection of hollow organs…

Q: Which one of these cell types lacks a cell nucleus and therefore have no DNA? A) Glia cells B) Red…

A: Introduction : The nucleus is a sphere-shaped organelle found in eukaryotic cells. It contains the…

Q: What do you think an assessment of a worker is based on?

A: Assessment of workers helps them evaluate their strengths and weakness, and work on them constantly.…

Q: Wild-type giraffes have long necks. Below is a pedigree of a family of giraffes that has a history…

A: The Pedigree shown here is based on autosomal recessive inheritance pattern which means that the…

Q: What is the term that refers to division of cytoplasm after telophase? Cytokinesis Replication…

A: Cell division is a metabolic phenomenon in which splitting of parent cell takes place results in…

Q: 2. What type of blood vessel returns blood to the heart? O A. Artery B. Vein O c. Capillary O D.…

A: ANSWER;- B) Vein Explain;- Veins (in blue) are the blood that returns blood to the heart. Profound…

Q: What type of muscle is pictured below?

A: The muscular system is made up of special types of cells known as muscle fibers. The main function…

Q: 17 STRE

A: Muscles of hand and arm

Q: Eye Anatomy Label the images to review the anatomy of the eye. Cornea Retina Iris Lens Lens…

A: In the eye, two types of gel-like substances are present. They are known as aqueous humor and…

Q: 24) If a person were to have substantial blood loss, you would expect to see all of the following…

A: Blood is a fluid that circulates in the body and carries nutrients, hormones, gases to different…

Q: Why would it be important to replicate DNA before a cell divides in mitosis or meiosis? For genetic…

A: Mitosis produces two identical nuclei from the original nucleus. Meiosis, on the other hand,…

Q: 5. Is the pedigree consistent with X-linked recessive 6. If no, which individual (of inheritance?…

A: The pedigree indicates a visual tool which is used for documenting the biological relationship in…

Q: 1. Which statement describes the chamber marked with a star? O A. It is the right atrium, and it…

A: Question - 1. Which statement describes the chamber marked with a star? A. It is the right atrium,…

Q: Which set of amino acids will likely to be located on the interior of a globular protei O Lys, Phe,…

A: Aminoacids are the building blocks of proteins. They are classified into polar and non polar amino…

Q: 11. Write the corresponding letter to each term in the table below to label the following…

A: 11) Label of DNA replication as followed- Leading strand- g DNA polymerase- f Lagging strand- e…

Q: Two unlinked genes control flower color in snapdragons. You cross a true-breeding yellow flowered…

A: Epistasis is a phenomenon in which one allele hides up the expression of another allele.  Epistasis…

Q: Which statement is true? A. All arteries carry oxygen-rich blood. B. All veins carry oxygen-rich…

A: The heart pumps blood and circulates it throughout all the body parts for their functioning. The…

Q: Which among the following statements DOES NOT describe meiosis? * Cells are genetically distinct…

A: 15. Option A is correct as meiosis produces distinct cells (4). The case is contrasting in case of…

Q: 25) Which blood vessels lack elastic tissue? A) muscular arteries and arterioles B) venules and…

A: Capillaries and venules

Q: Contrast the effects of mutations in genes encoding sporulation-specific sigma factors with…

A: Introduction Mutation in sigma factors:- Sigma factors are subunits of all bacterial RNA…

Q: Why might gram positive bacteria incorrectly appear to be gram negative after the gram staining…

A: Gram staining is a procedure which is used to identify whether the bacteria being tested in gram…

Q: Cross Phenotypes: 8 ivory eyes, maize body 9 wild eyes, wild type body = F2 You know that the male's…

A: 1. Genes control the genetic characteristics of an organism.  Genotype is the genetic…

Q: * 15-14 AG AG is +6.64 kJ/mole +1.59 kcal/mole for the reaction Citrate - = Isocitrate. is -267…

A: Since conditions inside the cell are different than standard temperature and pressure, biochemists…

Q: Question 27 Organelles are specialized, metabolically active structures within the cell. The…

A: Cell is the basic functional and structural unit of life. its function is carried on by different…

Q: a Where in the cell does DNA transcription take place? extranuclear region nucleus both the nucleus…

A: Transcription and translation is two of the most important functions occurring in the cell. In…

Q: 11. Based on the denaturation curve shown here for two separate proteins, A and B: a. Label the…

A: The 3-dimensional structure of a protein is dependent on the non-covalent interactions such as…

Q: 6 If exposure to a more acidic pH caused a decline in some sea urchin populations, how might this…

A: Ocean acidification is sometimes referred to as "climate change's equally wicked twin," and with…

Q: 2) a) What would be the effect of introducing a -1 frameshift mutation into the 23S rRNA gene? .: b)…

A: A frameshift mutation is one in which a nucleotide is inserted or deleted in such a way that the…

Q: From what DNA template strand was each of the following hnRNA base sequences transcribed?

A: hn RNA (heterogenous RNA ) in eukaryote transcribed from the DNA and it complementary of DNA…

Q: Column A Column B 1. It prevents bacterial growth for 24 hours and does not interfere A. Phenol with…

A: Introduction The commonly used urine preservatives include oxalic acid, hydrochloric acid, acetic…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.