Describe transcription. Molecular biology is the study of Biology at molecular level. Genetics & Molecular Biology Chapter Exam Instructions Choose your answers to the questions and click 'Next' to see the next set of questions. 12. MCQ 10 – Molecular Biology Questions from CSIR Papers 1 (Advanced) @. Ans: While one proceeds from lower to higher eukaryotes, the odd thing in the mitochondrial genome is that it gets smaller, e.g., the yeast mitochondrial DNA is five times larger than that of the human mitochondria. Q.9. How many RNA polymerases are present in a bacterial system? 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Molecular biology is the study of Biology at molecular level. In this lab, students will be given a hypothetical DNA sequence for part of an enzyme. The shape of a protein determines its function. Short strands of ——- primer are used in DNA replication. While science may not have the answers to every question, some biology questions are answerable. Biology Quiz Questions Animal Kingdom – Biology Questions 61-90 61) What is an animal? Here is the Huge Collection of Biology Questions, Multiple Choice Questions (MCQs), Short Questions with Answers for Biology Students. Here we have covered Important Questions on Molecular Basis of Inheritance for Class 12 Biology subject. Biology 280: Molecular Genetics Draw a diagram of a gene, include all regulatory regions that can impact transcription initiation. Question2: Are there living beings without cell? What is palindromic sequence of DNA? DNA synthesis can be measured by estimating the incorporation of radiolabelled. Question3: What are the two big groups into which cells are classified? A molecular biologist studies the processes of replication Start studying biology 1001.25 long questions. Q.7. Molecular biology / m ə ˈ l ɛ k j ʊ l ər / is the branch of biology that concerns the molecular basis of biological activity in and between cells, including molecular synthesis, modification, mechanisms and interactions. What is the importance of wobble and degeneracy? It is sometimes reasonable to assume that highly conserved protein like globin and cytochorme c can be used as a molecular clock to measure how long the species have been diverging from each other. Ans: A DNA sequence which codes for one or more structural genes (polypeptides) of related function and the DNA sequence which regulates the expression. What is wobble hypothesis? Short Questions: 26 Short Questions With Answers on “Organism and Populations” 15 Short Questions With Answers on “Food Production” 24 Short Questions With Answers on “Ecosystem” ADVERTISEMENTS: 25 Short Questions With … A double-stranded palindromic sequence can adopt either of two possible formations: 1. Register online for Biology tuition on Vedantu.com to score more marks in CBSE board examination. Then add the chromatin structure, making sure … Name different types of ecological pyramids. Write note on genetic code. Given below are molecular biology mcqs for the better understanding of concepts related to molecular biology. SUBJECTIVE QUESTIONS. Ans: The lac operon stands for lactose operon, an operon which contains genes specifying proteins involved in the utilization of (3 -galactosides such as lactose. Discuss nature of gene. Ans: In normal translation they mean for “Stop” codons. Molecular biology, field of science concerned with studying the chemical structures and processes of biological phenomena that involve the basic units of life, molecules.The field of molecular biology is focused especially on nucleic acids (e.g., DNA and RNA) and proteins—macromolecules that are essential to life processes—and how these molecules interact and behave within cells. 2. Ans: It is because more than one codon can code for the same amino acid. After reading the paragraph below, answer the question that follows. Some other mutator genes in E.Coli include in the mismatch repair system. Ans: The regulatory genes that produce a regulator protein controls induction (i.e., causing increase in rate of synthesis of an enzyme), and repression (i.e., blockage of gene expression). Biology is a wondrous science that inspires us to discover more about the world around us. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? According to him it is a unit of genetic subdivision beyond which recombination does not occur. The importance of wobble and degeneracy of the genetic code is that cell does not have to synthesize a different tRNA for each of the 61 sense codons. How is formyl group removed from the fmet polypeptide in bacteria? 1. The branching pattern of tree is calculated using the principle of parsimony (based on economy) to determine the minimum number of genetic changes required to derive the sequence of the gene in each organism from a common ancestor. Its primary focus is on the interactions that occurs between different cell systems that mostly includes the interrelationship of DNA, RNA and protein synthesis and regulation of this synthesis. Molecular Biology Recently Updated! A cistron may also be defined as the functional unit of genetic inheritance a segment of genetic nucleic acid which codes for a specific polypeptide chain. 13. [1] [2] The central dogma of molecular biology describes the process in which DNA is transcribed into RNA, then translated into protein. Disclaimer Copyright, Share Your Knowledge Below are 210 consecutive base pairs of DNA that includes only the beginning of the sequence of gene X. Biology Multiple Choice Questions and Answers for Different Competitive Exams 3. What are positive regulators (activators) and negative regulators (repressors)? Describe. What is the importance of wobble and degeneracy? Justify this statement. Khan Academy is a 501(c)(3) nonprofit organization. 250+ Cell Biology Interview Questions and Answers, Question1: What is the cell theory? A structural gene encoding a protein, rRNA or tRNA that contain one too many intervening sequences (introns) that although represented in primary RNA transcript of the gene are absent from the mature RNA molecule (mRNA, tRNA), therefore, do not contribute to the structure of the gene product. The lac Z gene encodes P-galactosidase, lac Y encodes (3 -galactoside permease and lac A encodes thiogalactoside transacetylase (Fig. Privacy Policy3. The codon AGG normally codes for argine but in altered translation it codes for stop. 14. Describe process of protein synthesis. These are the genes with intervening nucleotide sequences not involved in coding for the gene product. 7. Who discovered that X-rays induce mutations? What is odd in the studies made in the mitochondrial DNA (double-stranded circular DNA genome) as one proceeds from lower to higher eukaryotes? Content Guidelines 2. The term cistron has also been used as a synonym for gene. (With Methods)| Industrial Microbiology, How is Cheese Made Step by Step: Principles, Production and Process, Enzyme Production and Purification: Extraction & Separation Methods | Industrial Microbiology, Fermentation of Olives: Process, Control, Problems, Abnormalities and Developments, The best answers are voted up and rise to the top. In restriction endonuclease EcoR1, “E” stands for 1. extraction 2. the first letter of … Which of the following base-pairing rule is correct? Which organelle has its own DNA? The mutation may lead to reduced accuracy in the polymerising (nucleotide selection) activity or in the proof reading activity of the enzyme. Before sharing your knowledge on this site, please read the following pages: 1. Browse other questions tagged molecular-biology dna protein-binding or ask your own question. Ans: The Shine-Dalgarno sequence is located before the start sequence of mRNA. Ans: A cistron is a gene as defined in terms of the CIS-TRANS TEST, i.e., in a diploid cell or merozygote either of two homologous sequences in a genetic nucleic acid in which two mutations in trans fail to exhibit complete complementation. Q.3. Interviewing for biology Ph.D. programs This section is mainly for biology students whose prospective Ph.D. programs require interviews. In the case of mRNA the sequence of exons includes the coding sequence of the gene as well as noncoding leader and/ or trailor sequences. Share Your Word File Inducers and co-repressors act by binding to regulatory proteins referred to as activators and repressors. Stadler discovered independently in 1927 that X-rays induce mutations. Q.1. The study of various functions of structure is what we called molecular biology. 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