Description : DNA contains some palindromic sequences which (A) Mark the site for the formation of replication forks (B) Direct DNA polymerase to turn back to replicate the other strand (C) Are recognized by restriction enzymes (D) Are found only in bacterial DNA
Last Answer : Answer : C
Description : Restriction endonucleases (A) Cut RNA chains at specific locations (B) Excise introns from hnRNA (C) Remove Okazaki fragments (D) Act as defensive enzymes to protect the host bacterial DNA from DNA of foreign organisms
Last Answer : Answer : D
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 : All of the following statements about restriction endonucleases are true except: (A) They are present in bacteria (B) They act on double stranded DNA (C) They recognize palindromic sequences (D) They always produce sticky ends
Description : Restriction endonucleases are present in (A) Viruses (B) Bacteria (C) Eukaryotes (D) All of these
Last Answer : Answer : B
Description : The bacteria which cause dental cavities in humans break down sugars, releasing what chemical, that causes tooth destruction? a) acids b) bases c) enzymes d) monosaccharides
Last Answer : ANSWER: A -- acids
Description : Name some restriction enzymes. -Biology
Last Answer : answer:
Description : What is the significance of recognition sequences of restriction enzymes? -Biology
Description : Nomenclature of restriction enzymes. -Biology
Description : How are restriction enzymes used to make recombinant DNA? -Biology
Description : Role of restriction enzymes and DNA ligase -Biology
Description : Restriction enzymes and DNA methylation -Biology
Description : What is the enzymatic function of restriction enzymes? -Biology
Description : What is the source of restriction enzymes? -Biology
Description : What are restriction enzymes used for? -Biology
Description : Why are restriction enzymes called molecular scissors? -Biology
Description : Why are restriction enzymes used for DNA fingerprinting? -Biology
Description : Why is cutting enzymes known as the restriction enzymes? -Biology
Description : Assetion: Restriction enzymes cut the strand 27 of DNA to produce sticky ends Reason : Stickiness of the ends faciliates the action of the enzyme DNA
Last Answer : Assetion: Restriction enzymes cut the strand 27 of DNA to produce sticky ends Reason : Stickiness of ... D. If both assertion and reason are false
Description : Which of the following restriction enzymes produces blunt ends ?
Last Answer : Which of the following restriction enzymes produces blunt ends ? A. Xho I B. Hind III C. Sal I D. Eco RV
Description : What role do restriction enzymes play in analysis of Edna?
Last Answer : Feel Free to Answer
Description : A scientist wants to make a dna fingerprint and she used polymerase chain reaction and restriction enzymes what should her next step be?
Last Answer : use restriction enzymes is the right answer for apex :)
Description : Read the following four statements (A-D) about certain mistakes in two of them. (A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched. (B) Restriction enzymes are used in isolation of DNA ... mistakes? (a) B and C (b) C and D (c) A and C (d) A and B
Last Answer : (d) A and B
Description : PCR and restriction fragment length polymorphism are the methods for (a) study of enzymes (b) genetic transformation (c) DNA sequencing (d) genetic fingerprinting.
Last Answer : (d) genetic fingerprinting.
Description : During the process of isolation of DNA, chilled ethanol is added to (a) precipitate DNA (b) break open the cell to release DNA (c) facilitate action of restriction enzymes (d) remove proteins such as histones.
Last Answer : a) precipitate DNA
Description : The restriction enzymes are used in genetic engineering, because (a) they can cut DNA at specific base sequence (b) they are nucleases that cut DNA at variable sites (c) they can degrade harmful proteins (d) they can join different DNA fragments.
Last Answer : (a) they can cut DNA at specific base sequence
Description : Restriction endonucleases are enzymes which (a) make cuts at specific positions within the DNA molecule (b) recognize a specific nucleotide sequence for binding of DNA ligase (c) restrict the action of the enzyme DNA polymerase (d) remove nucleotides from the ends of the DNA molecule
Last Answer : (a) make cuts at specific positions within the DNA molecule
Description : Which of the following restriction enzymes produces blunt ends? (a) SalI (b) EcoRV (c) XhoI (d) HindIII
Last Answer : (b) EcoRV
Description : Identify the wrong statement with regard to restriction enzymes. (a) Each restriction enzyme functions by inspecting the length of a DNA sequence. (b) They cut the strand of DNA at palindromic sites. (c) They are useful in genetic engineering. (d) Sticky ends can be joined by using DNA ligases.
Last Answer : d) Sticky ends can be joined by using DNA ligases.
Description : The cutting of DNA at specific locations became possible with the discovery of (a) selectable markers (b) ligases (c) restriction enzymes (d) probes.
Last Answer : (c) restriction enzymes
Description : Which of the following is not required for any of the techniques of DNA fingerprinting available at present? (a) Restriction enzymes (b) DNA-DNA hybridisation (c) Polymerase chain reaction (d) Zinc finger analysis
Last Answer : (d) Zinc finger analysis
Description : The most important mechanism of antiinflammatory action of glucocorticoids is: A. Inhibition of lysosomal enzymes B. Restriction of recruitment of inflammatory cells at the site of inflammation C. Antagonism of action of interleukins D. Suppression of complement function
Last Answer : B. Restriction of recruitment of inflammatory cells at the site of inflammation
Description : Restriction enzymes are used in one of these techniques: (a). Sequencing (b). Genotyping (c). RFLP (d). Polymerization
Last Answer : Ans: (c). RFLP
Description : Chimeric DNA (A) Is found in bacteriophages (B) Contains unrelated genes (C) Has no restriction sites (D) Is palindromic
Description : Function of restriction endonuclease in bacteria -Biology
Description : Restriction endonucleases are (a) used for in vitro DNA synthesis (b) used in genetic engineering (c) synthesized by bacteria (d) present in mammalian cells for degradation of DNA.
Last Answer : (b) used in genetic engineering
Description : Restriction endonucleases (a) are present in mammalian cells for degradation of DNA when the cell dies (b) are used in genetic engineering for ligating two DNA molecules (c) are used for in vitro DNA synthesis (d) are synthesized by bacteria as part of their defense mechanism.
Last Answer : (d) are synthesized by bacteria as part of their defense mechanism.
Description : Genetic engineering is possible, because (a) we can cut DNA at specific sites by endonucleases like DNase I (b) restriction endonucleases purified from bacteria can be used in vitro (c) the phenomenon of transduction in bacteria is well understood (d) we can see DNA by electron microscope
Last Answer : (b) restriction endonucleases purified from bacteria can be used in vitro
Description : Without restriction endonucleases, it would be very difficult to a. Force Plasmids into Bacteria. b. Chemically Open Dna Molecules. c. Replicate Dna In A Recombinant Cell. d. Bring About Mutations In Bacteria.
Last Answer : b. Chemically Open Dna Molecules.
Description : Choose the correct statement in relation to treatment of urinary tract infection (UTI): A. Majority of UTIs are caused by gram positive bacteria B. Smaller doses of the antimicrobial agent ... drug gets concentrated in urine D. Most acute UTIs are treated with a combination antimicrobial regimen
Last Answer : B. Smaller doses of the antimicrobial agent suffice for lower UTI
Description : Which one of the following conditions correctly describes the manner of determining the sex? (a) Homozygous sex chromosomes (ZZ) determine female sex in birds. (b) XO type of sex chromosomes ... s syndrome, determines female sex. (d) Homozygous sex chromosomes (XX) produce male in Drosophila.
Last Answer : (b) XO type of sex chromosomes determine male sex in grasshopper.
Description : Mechanical digestion is the fragmentation of food aided by specialized physical structures, such as teeth, previous to extracellullar digestion. The mechanical fragmentation of food helps digestive ... there are mandibles and chewing muscles to triturate food previous to the chemical digestion.
Last Answer : Concerning extracellular digestion what is meant by chemical digestion?
Description : Which one of the following binds to specific nucleotide sequences that are upstream and most distant from the start site? (A) RNA polymerase (B) Repressor (C) Inducer (D) Restriction
Last Answer : Answer : A
Description : Which one of the following binds to specific nucleotide sequences? (A) RNA polymerase (B) Repressor (C) Inducer (D) Restriction
Description : All the following statements about restriction fragment length polymorphism are true except (A) It results from mutations in restriction sites (B) Mutations in restriction sites can occur in coding or non- ... It is inherited in Mendelian fashion (D) It can be used to diagnose any genetic disease
Description : In sticky ends produced by restriction endonucleases (A) The 2 strands of DNA are joined to each other (B) The DNA strands stick to the restriction endonuclease (C) The ends of a double stranded fragment are overlapping (D) The ends of a double stranded fragment are non overlapping
Description : Restriction endonucleases can recognise (A) Palindromic sequences (B) Chimeric DNA (C) DNA-RNA hybrids (D) Homopolymer sequences
Description : Restriction endonucleases split (A) RNA (B) Single stranded DNA (C) Double stranded DNA (D) DNA-RNA hybrids