Description : The binding of prokaryotic DNA dependent RNA polymerase to promoter sits of genes is inhibited by the antibiotic: (A) Streptomycin (B) Rifamcin (C) Aueromycin (D) Puromycin
Last Answer : Answer : B
Description : The binding of prokaryotic DNA dependent RNA polymerase to promoter sites of genes is inhibited by the antibiotic: (A) Puromycin (B) Rifamycin (C) Terramycin (D) Streptomycin
Description : Give some examples of chromoproteins.
Last Answer : Hemoglobin, flavoproteins, visual purple.
Description : In RNAi, the genes are silenced using (a) ds-RNA (b) ss-DNA (c) ss-RNA (d) ds-DNA.
Last Answer : (a) ds-RNA
Description : .Expressed Sequence Tags (ESTs) refers to (a) novel DNA sequences (b) genes expressed as RNA (c) polypeptide expression (d) DNA polymorphism.
Last Answer : (b) genes expressed as RNA
Description : Tobacco mosaic virus (TMV) genes are (a) single stranded RNA (b) double stranded DNA (c) proteinaceous (d) double stranded RNA.
Last Answer : (a) single stranded RNA
Description : _______ was first used to catalog organisms into one of three domains. a. Photosynthesis b. Ribosomal RNA genes c. Nuclear DNA genes d. Mitochondrial DNA genes
Last Answer : b. Ribosomal RNA genes
Description : Both DNA and RNA are composed of _______ a. polynucleotides b. genes c. polysaccharides d. polypeptides
Last Answer : a. polynucleotides
Description : The function of a repressor protein in an operon system is to prevent synthesis by binding to (A) The ribosome (B) A specific region of the operon preventing transcription of structural genes (C) The RNA polymerase (D) A specific region of the mRNA preventing translation to protein
Description : In the blood the vitamin esters are attached to (A) α1-lipoproteins (B) α2-lipoproteins (C) β-lipoproteins (D) γ-lipoproteins
Last Answer : Answer : C
Description : Carotenes are transported with the (A) Minerals (B) Proteins (C) Lipids (D) Lipoproteins
Last Answer : Answer : D
Description : Which of the following lipoproteins would contribute to a measurement of plasma cholesterol in a normal person following a 12 hr fast? (A) High density lipoprotiens (B) Low density lipoproteins (C) Chylomicron (D) Chylomicron remnants
Last Answer : Answer : A
Description : Chylomicron, intermediate density lipoproteins (IDL), low density lipoproteins (LDL) and very low density lipoproteins (VLDL) all are serum lipoproteins. What is the correct ordering of these particles from the lowest to ... , IDL, LDL (C) VLDL, IDL, LDL, Chylomicron (D) Chylomicron, IDL, VLDL, LDL
Description : The free fatty acids in blood are (A) Stored in fat depots (B) Mainly bound to β-lipoproteins (C) Mainly bound to serum albumin (D) Metabolically most inactive
Description : Which of the following lipoproteins would contribute to a measurement of plasma cholesterol in a normal individual following a 12 hr fast? (A) Chylomicrons (B) VLDL (C) Both VLDL and LDL (D) LDL
Description : Very low density lipoproteins are relatively rich in (A) Cholesterol (B) Triacyl glycerol (C) Free fatty acids (D) Phospholipids
Description : Cholesterol circulates in blood stream chiefly as (A) Free cholesterol (B) Ester cholesterol (C) Low density lipoproteins (D) Low density lipoproteins and high density lipoproteins
Description : Increase in blood of this class of lipoproteins is beneficial to ward off coronary heart disease: (A) HDL (B) LDL (C) VLDL (D) IDL
Description : The ‘free fatty acids’ (FFA) of plasma: (A) metabolically inert (B) mainly bound to β-lipoproteins (C) stored in the fat (D) mainly bound to serum albumin
Description : Changes in serum high density lipoproteins (HDL) are more truly reflected by those of (A) HDL-1 (B) HDL-2 (C) HDL-3 (D) HDLC
Description : The class of lipoproteins having a beneficial effect in atherosclerosis is (A) Low density of lipoproteins (B) very low density lipoproteins (C) High density lipoproteins (D) Chylomicrons
Description : The triacyl glycerol present in plasma lipoproteins are hydrolyzed by (A) Linqual lipase (B) Pancreatic lipase (C) Colipase (D) Lipoprotein lipase
Description : Hydrated density of HD lipoproteins is (A) 0.94 gm/ml (B) 0.94–1.006 gm/ml (C) 1.006–1.063 gm/ml (D) 1.063–1.21 gm/ml
Description : Very low density lipoproteins are also known as (A) β-lipoproteins (B) Pre β--lipoproteins (C) α-lipoproteins (D) None of these
Description : The density of lipoproteins increases as the protein content (A) Increases (B) Decreases (C) Highly decreases (D) Slightly and promptly decreases
Description : Hydrated density of (HD) lipoproteins is (A) 0.94 gm/ml (B) 0.94-1.006 gm/ml (C) 1.006-1.063 gm/ml (D) 1.063-1.21 gm/l
Description : Transcortins are (A) Mucoproteins (B) Glycoproteins (C) Metalloproteins (D) Lipoproteins
Description : β-lipoproteins have the density in the range of (A) 0.95–1.006 (B) 1.006–1.019 (C) 1.019–1.063 (D) 1.063–1.125
Description : Which are the cholesterol esters that enter cells through the receptor-mediated endocytosis of lipoproteins hydrolyzed? (A) Endoplasmin reticulum (B) Lysosomes (C) Plasma membrane receptor (D) Mitochondria
Last Answer : B
Description : How lipoproteins are estimated?
Last Answer : Either by electrophoresis or by ultracentrifugation.
Description : Chimeric DNA (A) Is found in bacteriophages (B) Contains unrelated genes (C) Has no restriction sites (D) Is palindromic
Description : Besides structural genes that encode proteins, DNA contains some regulatory sequences which are known as (A) Operons (B) Cistrons (C) Cis-acting elements (D) Trans-acting factors
Description : What is the term for manipulating the genes of organisms to introduce new characteristics? a. Genomics b. Genetic engineering c. Recombinant RNA d. Genetic resistance
Last Answer : b. Genetic engineering
Description : In a eukaryotic microbe, those sections of a primary RNA transcript that will NOT be translated are called a. Introns. b. Anticodons. c. ―Jumping Genes.‖ d. Exons.
Last Answer : a. Introns.
Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes
Description : The mechanism of synthesis of DNA and RNA are similar to all the following ways except (A) They involve release of pyrophosphate from each nucleotide added (B) They require activated nucleotide precursor and Mg2+ (C) The direction of synthesis is (D) They require a primer
Description : The normal function of restriction endonucleases is to (A) Excise introns from hrRNA (B) Polymerize nucleotides to form RNA (C) Remove primer from okazaki fragments (D) Protect bacteria from foreign DNA
Description : Another name for reverse transcriptase is (A) DNA dependent DNA polymerase (B) DNA dependent RNA polymerase (C) RNA dependent DNA polymerase (D) RNA dependent RNA polymerase
Description : In the process of transcription, the flow of genetic information is from (A) DNA to DNA (B) DNA to protein (C) RNA to protein (D) DNA to RNA
Description : Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides
Description : Orcinol method is employed in the quantitation of (A) Nucleic acid (B) DNA (C) RNA (D) Proteins
Description : Diphenylamine method is employed in the quantitation of (A) Nucleic acid (B) RNA (C) DNA (D) Proteins
Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes
Description : The mechanism of synthesis of DNA and RNA are similar in all the following ways except (A) They involve release of pyrophosphate from each nucleotide added (B) They require activated nucleotide precursor and Mg2+ (C) The direction of synthesis is 5’ → 3’ (D) They require a primer
Description : Unit of genetic information: (A) DNA (B) RNA (C) Cistron (D) None of these
Description : Genetic information in human beings is stored in (A) RNA (B) DNA (C) Both (A) and (B) (D) mRNA
Description : If in a nucleic acid there are more than 8000 nucleotides it is most likely (A) RNA (B) DNA (C) Both (A) and (B) (D) None of these
Description : Genetic information in human beings is stored in (A) DNA (B) RNA (C) Both (A) and (B) (D) None of these
Description : RNA synthesis requires (A) RNA primer (B) RNA template (C) DNA template (D) DNA primer
Description : RNA directed DNA polymerase is (A) Replicase (B) Transcriptase (C) Reversetranscriptase (D) Polymerase–III