Users Also Read
Read MCQ's/Objective questions
MCQ's Search Engine
Allosteric Effects
Amino Acid Metabolism
Anti Bodies
Antigen
ATP Synthesis and Fatty Acid Oxidation
Carbohydrate
Cell Signalling and Transduction
Cell Structure and Compartments
Chromatography
Disease Associated with Immune System
Enzymes
FT IR Spectroscopy
Gas Chromatography
Gel Electrophoresis
Genetic Code and Regulation
Genetic Regulation Prokaryotes
Glycolysis
HPLC
Immune Response
Immune System
Immunological Techniques
Lipid
Membrane Structure and Functions
Minerals
Nitrogen Metabolism
NMR Spectroscopy
Nucleic Acids
Oxidative Phosphorylation
Photosynthesis and Respiration
Polymerase Chain Reaction
Protein and Nucleic Acid Interactions
Protein Purification
Protein Stability
Protein Structure
Protein Synthesis
Recombinant DNA Technology
RNA Structure
Spectroscopy
Structure and Properties of Amino Acids
Structure and Properties of Peptides
TCA Cycle
Thermodynamics and Free Energy
Transcription and Regulation
UV Luminance Spectroscopy
Vitamins and Coenzymes
Water, pH and Macromolecules
Home⇒ Medical Science⇒ Biochemistry⇒ Dna structure and replication
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ What bands will be observed in a cesium chloride gradient after two rounds of replication? One light and one medium band [other wrong options] [Discuss in forum] One light, one medium and one heavy band One medium band One medium and one heavy band |
Q22 ⇒ DNA can be sequenced by the both (a) and (b) [other wrong options] [Discuss in forum] chemical method chain termination procedure physical method |
Q23 ⇒ In DNA double helix, the two DNA chains are held together by hydrogen bonds between the pair of bases [other wrong options] [Discuss in forum] covalent bonds between the pair of bases ionic bonds between the pair of bases none of the above |
Q24 ⇒ What is the only common methylation in the DNA of eukaryotes? Cytosine in CpG dinucleotides [other wrong options] [Discuss in forum] Adenosine in GpA dinucleotides Guanosine in ApGpA trinucleotides None of the above |
Q25 ⇒ Which DNA polymerase removes RNA primers in DNA synthesis? Polymerase I [other wrong options] [Discuss in forum] Polymerase II Polymerase III none of these |
Q26 ⇒ DNA helicase is used to unwind the double helix [other wrong options] [Discuss in forum] interact the double helix closely break a phosphodiester bond in DNA strand none of the above |
Q27 ⇒ When DNA polymerase is in contact with guanine in the parental strand, what does it add to the growing daughter strand? Cytosine [other wrong options] [Discuss in forum] Phosphate Uracil Guanine |
Q28 ⇒ DNA replication takes place in which direction? 5 'to 3' [other wrong options] [Discuss in forum] 3' to 5' Randomly Vary from organism to organism |
Q29 ⇒ What is the range of melting point temperatures (Tm) for most DNA molecules? 80 to l00°C [other wrong options] [Discuss in forum] 50 to 60°C 60 to 80°C 70 to 90°C |
Q30 ⇒ The nucleosome consists of histone octamer and 146 bp of DNA [other wrong options] [Discuss in forum] tetramer and 146 bp of DNA hexamer and 146 bp of DNA none of the above |
Q31 ⇒ Okazaki fragments occur during replication [other wrong options] [Discuss in forum] transformation polymerase reaction synthesis |
Q32 ⇒ Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that both chromatids of a chromosome were labeled [other wrong options] [Discuss in forum] only one chromatid of a chromosome was labeled both (a) and (b) neither chromatid was labeled |
Q33 ⇒ Which of the following is incorrect? None of the above [other wrong options] [Discuss in forum] In DNA double helix, two strands of the DNA are bound with each other with the bases Adenine always pairs with thymine Guanine always pairs with the cytosine |
Q34 ⇒ Which of the following enzyme adds complementary bases during replication? Polymerase [other wrong options] [Discuss in forum] Helicase Synthesase Replicase |
Q35 ⇒ The higher order structure of DNA shows symmetry, whereas the higher order structures of most proteins do not. Why isn't protein shape more regular like DNA? All of the above [other wrong options] [Discuss in forum] DNA has one main function in cells whereas proteins have many. The many different amino acid R groups on proteins confer many different shapes. Some S amino acids cause proteins to bend; others cause protein to flatten. |
Q36 ⇒ Which is the largest among the followings? Nucleotide [other wrong options] [Discuss in forum] Nitrogenous base Phosphate Carbon |
Q37 ⇒ In DNA, there are four bases known as adenine, guanine, thymine and cytosine [other wrong options] [Discuss in forum] five bases known as adenine, guanine, thymine, tryptophan and cytosine three bases known as adenine, guanine and cytosine only two bases known as adenine and cytosine |
Q38 ⇒ A cesium chloride will separate DNA molecules by density [other wrong options] [Discuss in forum] absorption resorption adhesion |
Q39 ⇒ Proteins involved in opening a replication bubble are DNA topoisomerase [other wrong options] [Discuss in forum] DNA helicases single stranded binding proteins ligase |
Q40 ⇒ Which histone(s) are associated with the linker DNA of a nucleosome? Histone H1 [other wrong options] [Discuss in forum] Histones H2A and H2B Histone H3 Histone H4 |
Or |