Micr 3033 - Study guides, Class notes & Summaries

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...

10.1Q1 Define three stages of the cell cycle? Correct Answer-Interphase G0: where cells rest G1: where cells grow and expand S: where DNA is replicated G2: where cells repair damaged DNA and duplicate centrosomes Cell division (M) phase Where cells undergo nuclear and cytoplasmic division 10.2Q1 What are cyclin-dependent kinases (Cdks)? Correct Answer-A small family of protein kinases that regulate the transition of various phases in the cell cycle. CDKs are small proteins that mainl...

MICR 3033 Exam 1 Test Questions with Answers Hemoglobin requires which small non-protein molecule to capture oxygen? - Answer-heme. Enzymes that add or remove a phosphate group are respectively named? - Answer-kinase and phosphatase. Which of the statements about binding and active sites are TRUE? - Answer-a binding site recognizes the substrate and the active site catalyzes the reaction. Endoglucanases and cellobiohydrolases have the same catalytic center but have a variant configura...

All cells that make up an organism contain the exact same DNA sequence (genome) however individual cell-types look and function very differently. Why? Correct Answer-each cell-type expresses a unique set of genes of the genomic DNA. Speaking of genotype and phenotype how are these terms defined? Correct Answer-the genotype defines the genetic information (gene) and the phenotype the outcome of gene expression. Which of the following describes a functional gene? Correct Answer-a gene is def...

MICR 3033 Exam 2 Questions with Complete Solutions Endoglucanases and cellobiohydrolases have the same catalytic center but have a variant configuration of the binding site. Identify, which of the following is TRUE? - Answer-Because the catalytic site is identical but the binding site different both enzymes can interact with the substrate in different ways thus producing different catalytic products. Two molecules are similar but not identical in structure and affect enzyme activity diffe...

MICR 3033 Final Tested Questions with Revised Answers Graded A+ 10.1Q1 Describe the steps of M-CDKs activation. - Answer-Cyclin dependent kinases have to associate with a cyclin to activate; M-cyclins associate with the kinase; more steps with an activating kinase, inhibiting kinase, and a phosphatase that all receive input signals to control when M-CDKs are active 10.2Q1 Why are M-Cdk and S-Cdk regulated by sequential cyclin activation in addition to multiple phosphorylation and dephosphory...

MICR 3033 Exam 3 Questions & Revised Answers All Updated Which of the following polymers of glucose is used to store energy reserves in animal cells? - Answer-glycogen The conversion of methane (CH4) to methanol (CH3OH) illustrates what kind of reaction? - Answer-oxidation A chemical reaction that releases free energy is referred to as "energetically favorable." Another way to describe this reaction is: ____. - Answer-spontaneous When atoms lose (donate, transfer) electrons scientists...

Micr 3033 Ch. 4 Test 1 Questions with Answers What common feature of alpha helices and beta sheets make them universal building blocks for proteins? - Answer-The hydrogen bonds that can be formed between the carbosxyl group of one amino acid and the N-terminal of another amino acid these bonds help form the structure and shape of alpha helix's and beta sheets and allow the protein to be tightly packed. Why do you suppose that only L-amino acids and not a random mixture of L- and D- amino a...

Micr 3033 Ch. 3 and 13 Tested Questions with Revised Answers | UPDATED!!!! Describe briefly the three stages of cellular metabolism that lead from food to waste products in animals cells. - Answer- The figure above illustrates the coupling of a favorable reaction to drive and unfavorable one. Describe how this concept works in cells using as an example one of the common activated carrier molecules. - Answer-The anabolic process of building polysaccharides is unfavorable, but coupled with t...