MiRNAs Study guides, Class notes & Summaries

Which of the following statements concerning translational repression from miRNAs are false? miRNA complexes can cause ribosomes to fall off mRNA prematurely. The removal of the polyA tail by miRNA complexes causes the mRNA to be digested by RiSC. The RiSC complex, when directed my miRNAs, can cause mRNA to become circular in structure which inhibits translation. miRNA directed RiSC complexes can bind to ribosomal subunits preventing the assembly of a functional ribosome (with large and ...

2024 CPPS 303 - Lipids 5 ( Adipose Tissues in Metabolism and as an Endocrine Organ ) Pt. 2 Complete Questions & Answers (Solved) 100% Correct 1. What do Adipocytes Secrete? (8) Answer: - Metabolites - Inflammatory Mediators - Novel Signalling Lipids - Circulating Exosomal miRNAs - Binding proteins/precursors - Peptides - Hormones - Growth Factors 2. How do secreted products act on cells/organs? Answer: Both paracrine and endocrineaction 3. Processes that Adipocytes regulate (4)...

Cell Bio Practice Exam 2|32 Questions with Verified Answers RNA in cells differs from DNA in that ___. - CORRECT ANSWER it is single-stranded and can fold up into a variety of structures Transcription is similar to DNA replication in that ___. - CORRECT ANSWER nucleotide polymerization occurs only in the 5′-to-3′ direction. Which of the following statements is FALSE? (a) A new RNA molecule can begin to be synthesized from a gene before the previous RNA molecule's synthesis is compl...

2024 CPPS 303 - Adipose Tissue 2 Complete Questions & Answers (Solved) 100% Correct 1. What do adipocytes and other cells in adipose tissue secrete? Answer: numerousproteins, lipids and nucleic acids 2. What are adipokines? Answer: regulatory peptides 3. What are lipokines? Answer: regulatory lipid species 4. What processes do the proteins, lipids and nucleic acids secreted by adipocytes regulate or modulate? Answer: lipid and glucose homeostasis, energy balance, inflammation and tis...

NR507 Midterm Test Questions with Complete Solutions What is epigenetics? - ANSWER The study of heritable changes in gene expression or phenotype casued by mechanisms *other* than changes in DNA sequences. DNA methylation - ANSWER The attachment of a methyl group to a cytosine base is followed by a guanine base...causes a gene to become transcriptionally inactive or silent. Epigenetic processes play a major role in cancer initiation, progression, and treatmen...

BIO 302 hw and practice Exam 2|30 Questions with Verified Answers Which form of control directly influences which mRNAs are selected by ribosomes for the synthesis of proteins? a. mRNA degradation control b.mRNA processing and localization control c. Protein activity control d. Transcriptional control e. Translational control - CORRECT ANSWER translation control Transcription regulators usually bind where on a DNA double helix? a. 3' End b. 5' End c. Major groove d. Minor gr...

MMSC 490 Exam 2 Questions and Answers All Correct The genomes of salamanders contain ten times more DNA than the genomes of humans because salamanders - Answer-have more noncoding DNA than humans have. A gene can be defined as a segment of DNA that codes for - Answer-functional product. Introns in mRNA-coding genes are the transcribed sequences - Answer-between protein-coding sequences. In the nucleus, introns are removed from transcripts by - Answer-splicing introns can encode - Ans...

What is the first mRNA processing step? - ANSWER 5' capping Different mRNAs are made from the same initial pre-mRNA by ________. - ANSWER alternative splicing RNA transcription begins at a ________. - ANSWER promoter ________ protect(s) the pre-mRNA molecule. - ANSWER the 3' poly-a tail The process of pre-mRNA splicing removes ________. - ANSWER introns Spliced ________ differ in their exons. - ANSWER mRNAs Identify the three phases of transcription. - ANSWER initiation, elongation, te...

What is the chemical structure of a component found in four of the five cofactors used by Na+-NQR? says it is composed of flavin structure is a nucleotide base structure B could be structure C also could be structure D is an amino acid down between B and C to help, look at the captioned note on the table. it says Fl represents flavin which is the redox active center in four of the five cofactors of Na+-NQR C has an uniquinone AND HERE IS IS MENTIONED THAT UNIQUINONE IS IS A SUBSTATE ...

From the list below, select the one cellular structure or compartment that is not found in animal cells: A. Plasmodesmata B. Golgi apparatus C. Endoplasmic Reticulum D. Plasma membrane - Answer-A The most reliable feature distinguishing a eukaryotic cell from prokaryotic cell is the: A. Presence of plasma membrane B. Presence of a nucleus C. Eukaryotic cells larger size D. Presence of DNA - Answer-B Noncovalent bonds are too weak to influence the 3D structure of macromolecules, such a...