Answer:
transcription initiation
Explanation:
Transcription is a process by which genetic information from DNA is used to synthesize an RNA molecule, usually, a messenger RNA (mRNA), which is subsequently utilized to synthesize a protein by a process called translation. Transcription in prokaryotes has three steps:
1-Initiation: the RNA polymerase is a multisubunit enzyme (holoenzyme) composed of two α, one β, one β’ and one ω and σ subunits (α2ββ’ωσ). This holoenzyme binds to the promoter region of the template DNA strand.
2-Elongation. The sigma σ factor of the holoenzyme is released and the complex and the core enzyme (α2 ββω) moves along the template strand, thereby producing an mRNA sequence
3-Termination. This step can be Rho-dependent, where a protein named "Rho" recognizes the termination site and stop transcription, and Rho-independent (transcription continues until the termination sequence is reached).
In consequence, Rifamycin is likely to block the initiation of transcription because the core RNA enzyme needs to bind the sigma factor (σ) for initiation of transcription in bacteria.
Answer:
A = 1
B = 4
C = 5
D = 3
E = 2
F = 6
Explanation:
A) Peptide hormones are not lipid soluble hence known as lipophobic and cannot diffuse through cell membranes examples of peptide hormones include luteinizing hormones, thyroid stimulating hormones, insulin and follicle-stimulating hormones.
B) Steroid hormones can not stored in secretory vesicles because of their lipophilic nature.
C) Amino acid-derived hormone are the hormones which are derived from tyrosine and tryptophan.
D) Anterior pituitary lobe of Pituitary gland is true endocrine gland of epithelial origin.
E) Hypothalamus produce screates six hormones in which vasopressin is also synthesized.
F) Posterior pituitary is responsible for storage and release site for oxytocin
Answer:
Animals are made up of eukaryotic cells, meaning they have a nucleus which contains the DNA. :)
By studying a particular species .
