Core histone Samenvattingen, Aantekeningen en Examens

7Q1-Describe the double helix nature of DNA. Why is it that DNA is always found as a double stranded, antiparallel and complementary molecule? Correct Answer-The two strands of DNA run in anti-parallel directions and attached to each sugar is one of four types of nitrogenous bases, which make hydrogen bonds. It is antiparallel and complementary so that it has two copies as a safety measure. 7Q2-What are histones and the structural components(DNA/proteins)of a nucleosome? Correct Answer-Histon...

CHEM 441A FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS. Instructions: 1. DO NOT begin the exam until instructed to do so. 2. SWITCH OFF your phones. 3. Make sure there is a total of 12 pages. 4. Write your Name AND Exam number (A or B) on your Scantron. 5. When finished, place Exam sheet and Scantron and return all materials to the instructor. Summary of points: 1. Answer on Scantron Section A (Q# 1….60) (60 Points) 2. Answer on the Exam Sheet Section B, C, and D (Q# 61-90) (40 Points...

MICR 3033 Exam 2 Questions with Revised Answers Graded A+ 7Q1-How does DNA interact with the core histone nucleosome? - Answer-DNA wraps around the core histone 7Q2-What is the length(fixed)of DNA(in base pairs) that wraps around a core nucleosome? - Answer-147 base pairs 7Q3-What is the 30-nm fiber structure in chromatin? - Answer-solenoid 7Q4-What is meant by the terms Chromatin? Euchromatin? and Heterochromatin? - Answer-Heterochromatin is condensed chromatin which makes it inactiv...

CHEM 441A FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS. Instructions: 1. DO NOT begin the exam until instructed to do so. 2. SWITCH OFF your phones. 3. Make sure there is a total of 12 pages. 4. Write your Name AND Exam number (A or B) on your Scantron. 5. When finished, place Exam sheet and Scantron and return all materials to the instructor. Summary of points: 1. Answer on Scantron Section A (Q# 1….60) (60 Points) 2. Answer on the Exam Sheet Section B, C, and D (Q# 61-90) (40 Points...

Give two examples of how eukaryotic organisms derive benefits from regulating gene expression - 1) Rabbits change from brown to white due to a response to environmental changes 2) larval to adult is totally different b/c of different proteins during life changes gene expression control is used in multicellular organisms to. . . - define tissues and cells w/ specific functions w/in organism What is the order of regulation of gene expression - transcription, RNA processing, translation, post...

Helix Review Exam 2 Questions & Answers 2024/2025 A leucine zipper is composed of two dimerized alpha helices. Hydrogen bonding WITHIN each alpha helix is an example of which of the following? a. primary structure b. quaternary structure c. tertiary structure d. secondary structure - ANSWERSd. secondary structure The octameric histone core is composed of four different histone proteins, assembled in a stepwise manner. Once the core octamer has been formed, DNA wraps around it to form...

19S - regulatory particle of proteasome 2 Categories of Epigenetics - DNA methylatioin and histone modification 20S - core particle of proteasome 26S proteasome - inhibited in sporadic parkinsonism 3 groups of Bcl-2 family proteins - 1. Group I - Anti-apoptitic 2. Group II - Inducers 3. Group III - Potentiate 3 key molecules of apoptosis - 1. Bcl-2 family proteins 2. Apaf-1 3. caspases 3 metabolic pathways that regulate aging - 1. Dietary restrictions 2. Insulin/Insulin-like Growth Fa...

How large is our genome? - Answer-3200 million bp How many base pairs does the genome contain? - Answer-3 × 10^9 base pairs. How long is the genome when fully extended? - Answer-20,000 phone books long What is Chromatin? - Answer-the fibrous complex of eukaryotic DNA and histone proteins. Which are the main Histones? - Answer-H1, H2A, H2B, H3, and H4. What's the charge (polarity) of Histones? - Answer-Positive What amino acid residues are responsible for that net charge? - An...

BCHM 218 Exam Questions and Answers 100% Pass Chromatin is composed of: - Correct Answer️️ -DNA and protein Of the proteins associated with chromatin, which of the following represents the largest component? - Correct Answer️️ -Histones The first evidence for nucleosome formation came from digesting chromosomal DNA with a non-specific nuclease. Gel electrophoresis of the DNA after the reaction revealed: - Correct Answer️️ -A large band corresponding to 200bp Each nucleosome c...

Single Nucleotide Variant (SNV) - ANS differences in DNA sequence. 46 chromosomes. >1% of population. Common complex traits bp in nucleus - ANS 6 billion Chromatin - ANS packaged DNA. Composed of DNA helix wound around histone proteins forming nucleosomes. 150 bp of DNA wound around each histone core Amino acid - ANS 20 different molecules used to build proteins. Coded by genes. Organic. Contains a Carboxyl (-COOH) and an Amino (-NH2) group Cent...