Transcription factors - Study guides, Class notes & Summaries

Test Bank Porth Pathophysiology Concepts of Altered Health States 2nd Canadian EditionTable of Contents Chapter 01: Concepts of Health and Disease .......................................................................................................... 2 Chapter 02: Concepts of Altered Health in Children ............................................................................................. 13 Chapter 03: Concepts of Altered Health in Older Adults ............................................

Protein Synthesis Race Questions and Answers Already Passed What is the role of RNA polymerase in protein synthesis? RNA polymerase is responsible for transcribing DNA into mRNA during the process of transcription. How is protein synthesis affected if the ribosome malfunctions? If the ribosome malfunctions, protein synthesis can be halted or produce defective proteins, potentially disrupting cellular functions. What happens during the initiation phase of translation? During init...

You are most likely to see hag fish, sperm whales, and viperfish inhabiting which of the following zones of the ocean? a. abyssal b. bathypelagic c. epipelagic d. mesopelagic - Correct Answer-bathypelagic What was the first seed plant to appear? a. angiosperm b. bryophytes c. gymnosperm d. nonvascular plants - Correct Answer-gymnosperm In a pedigree for an autosomal recessive disorder, which of the following will occur if two homozygous unaffected individuals mate? a. They will have affected off...

Pribnow box correct answers -interacts with a specific component of sigma part of RNA polymerase to line it up on DNA -located 10 bases before the start of transcription -consensus TATAAT Sigma factor correct answers -key to allowing RNA polymerase bind to promoter sequence -more than one sigma factor -turn on/off whole suits of genes -closer to particular sequence in promoter (consensus), the stronger the promoter -recognize Pribnow box and -35 region -35 region correct answers ~35 ...

Eukaryotic promoters have a basal region which can contain a TATA box, initiator (Lnr), BRE (TFIIV recognition element) and what other element? ~~> Downstream core promoter (DPE) In prokaryotes RNA polymerase requires what co-factor? ~~> 70 sigma factor Forms the holoenzyme The promoter is formed of two hexameric sequences at what positions? ~~> -35 and -10 The amount of product transcribed is dependant on how close the promoter sequences are to what? ~~> Consensus s...

MCDB 101B PASSED Exam Questions and CORRECT Answers repressors - Correct ANSWER- Eukaryotic transcription factors that bind specific DNA sites near a gene, such as enhancers, and prevent the initiation of transcription of the gene are called repressors. - In eukaryotes, the primary function of repressors is different: Eukaryotic repressors generally recruit corepressor proteins to enhancers - Corepressor proteins on their own cannot bind to DNA, so they can associate with enhancers ...

You are most likely to see hag fish, sperm whales, and viperfish inhabiting which of the following zones of the ocean? a. abyssal b. bathypelagic c. epipelagic d. mesopelagic - correct answer bathypelagic What was the first seed plant to appear? a. angiosperm b. bryophytes c. gymnosperm d. nonvascular plants - correct answer gymnosperm In a pedigree for an autosomal recessive disorder, which of the following will occur if two homozygous unaffected individuals mate? a. They w...

which of the following components of an amino acid differs from one amino acid to another - Answerthe R group Sometimes atoms gain or lose particles. The loss of which of the following would result in a change of overall electrical charge? - Answer-protons or electrons what is the cell theory - Answer-1. theof cells A pair of shared valence electrons is referred to as a(n) - Answer-covalent bond scientists wanted to track the movement of specific organic molecules in a cell by using radioac...

Transcription - synthesis of RNA from DNA Transcription results in - mRNA RNA polymerase makes -mRNA mRNA - makes proteins RNA polymerase - binds to DNA Transcription factors (TFs) - A regulatory protein that binds to DNA and affects transcription of specific genes. Can wither activate or repress expression of genes Termination of transcription - RNA polymerase reaches a terminator sequence (Stop codon) and detaches from the template Translation - Process by which mRNA is decoded and a ...

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? - ANSWER The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas A student placed a semipermeable membrane inside a U-shaped channel with two chambers, as shown. The membrane permits the movement of water but not salt. The...