Description : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ _____ GAATTC _____ 3′ 3′ _____ CTTAAG _____ 5′ (a) ... completed (b) Deletion mutation (c) Start codon at the 5′ end (d) Palindromic sequence of base pairs
Last Answer : (d) Palindromic sequence of base pairs
Description : Which one of the following represents a palindromic sequence in DNA? (a) 5′ - GAATTC - 3′ (b) 5′ - CCAATG - 3′ 3′ - CTTAAG - 5′ 3′ - GAATCC - 5′ (c) 5′ - CATTAG - 3′ (d) 5′ - GATACC - 3′ 3′ - GATAAC - 5′ 3′ - CCTAAG - 5′
Last Answer : (a) 5′ - GAATTC - 3′ 5′ - CCAATG - 3′ 3′ - CTTAAG - 5′
Description : The specific palindromic sequence which is recognised by EcoRI is (a) 5′ - GAATTC - 3′ (b) 5′ - GGAACC - 3′ 3′ - CTTAAG - 5′ 3′ - CCTTGG - 5′ (c) 5′ - CTTAAG - 3′ (d) 5′ - GGATCC - 3′ 3′ - GAATTC - 5′ 3′ - CCTAGG - 5′.
Last Answer : (a) 5′ - GAATTC - 3′
Description : 1. This palindromic sequence GAATTC is recognised by the RE CTTAAG a) BamH I b) Sal I c) EcoRI d) Hind III
Last Answer : c) EcoRI
Description : Which of the following statement is correct? A- The size and sequence of introns can be deduced from the cDNA sequence B- Restriction endonuclease can cleave ss and dsDNA both C- Restriction ... sequenceof a gene D- Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Last Answer : Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Description : Which of the following statement is correct? A- The size and sequence of introns can be deduced from the cDNA sequence B- .Restriction endonuclease can cleave ss and dsDNA both C- Restriction ... of a Gene D- Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Description : A seals sticky ends of recombinant DNA segments. a. DNA Ligase b. restriction endonuclease c. protease d. RNA polymerase
Last Answer : b. restriction endonuclease
Description : Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) ... (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.
Last Answer : (c) The enzyme binds DNA at specific sites and cuts only one of the two strands.
Description : What determines where a restriction endonuclease cuts? -Biology
Last Answer : answer:
Description : Function of restriction endonuclease in bacteria -Biology
Description : What is restriction endonuclease used for? -Biology
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
Last Answer : Answer : C
Description : Genetic engineering requires enzyme: (A) DNA ase (B) Amylase (C) Lipase (D) Restriction endonuclease
Last Answer : Answer : D
Description : Recombinant DNA is achieved by cleaving the pro-DNAs by (a) ligase (b) restriction endonuclease (c) primase (d) exonucleases.
Last Answer : (b) restriction endonuclease
Description : Which of the following cut the DNA from specific places? (a) E.coli restriction endonuclease I (b) Ligase (c) Exonuclease (d) Alkaline phosphate
Last Answer : (a) E.coli restriction endonuclease I
Description : Restriction endonuclease (a) synthesizes DNA (b) cuts the DNA molecule randomly (c) cuts the DNA molecule at specific sites (d) restricts the synthesis of DNA inside the nucleus.
Last Answer : (c) cuts the DNA molecule at specific sites
Description : There is a restriction endonuclease called EcoRI. What does “co” part in it stand for? (a) colon (b) coelom (c) coenzyme (d) coli
Last Answer : (d) coli
Description : Which of the following is a restriction endonuclease? (a) DNase I (b) RNase (c) Hind II (d) Protease
Last Answer : (c) Hind II
Description : A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using (a) EcoRI (b) Taq polymerase (c) polymerase III (d) ligase.
Last Answer : (d) ligase.
Description : Manipulation of DNA in genetic engineering became possible due to the discovery of (a) restriction endonuclease (b) DNA ligase (c) transcriptase (d) primase
Last Answer : (a) restriction endonuclease
Description : Enzyme which can break and seal the DNA strand a) Topoisomease II (b) Helicase (c) Primase (d) Restriction endonuclease
Last Answer : a) Topoisomease II
Description : Which sequence in case of eukaryotes is important for MRNA tailing? (a) GAGAGA (b) GAATTC(c) UACGAC (d) UACUAAC
Last Answer : (d) UACUAAC
Description : All the following statements about tRNA are correct except (A) A given tRNA can be charged with only one particular amino acid (B) The amino acid is recognized by the anticodon of tRNA (C) The amino acid is attached to end of tRNA (D) The anticodon of tRNA finds the complementary codon on mRNA
Last Answer : Answer : B
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
Description : The enzyme adds complementary bases to the DNA template strand during replication. a. Ligase b. Helicase c. DNA polymerase III d. RNA polymerase
Last Answer : d. RNA polymerase
Description : What is term used for a bacterial cell that is able to take up naked DNA? A- Complementary B- Liable C- Competent D- Infected
Last Answer : Competent
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 : Cytotoxic T-cells can be recognized by which of the following cell surface marker? A- CD4 B- CD7 C- CD8 D- CD9
Last Answer : CD8
Description : Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells ... selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Last Answer : CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Description : If the base sequence on a separated DNA strand is CGTAGG what will the base sequence on its complementary strand be?
Last Answer : What is the answer ?
Description : Anticodon sequence are seen in (A) tRNA and transcribed DNA strand (B) tRNA and complementary DNA strand (C) mRNA (D) mRNA and complementary DNA strand
Last Answer : Answer : A
Description : mRNA is complementary to the nucleotide sequence of (A) Coding strand (B) Ribosomal RNA (C) tRNA (D) Template strand
Description : What is antisense technology? (a) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene (b) RNA polymerase producing DNA (c) A cell displaying a foreign antigen used for synthesis of antigens (d) Production of somaclonal variants in tissue cultures
Last Answer : (a) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
Description : If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence? (a) TTAGU (b) UAGAC (c) AACTG (d) ATCGU
Last Answer : (a) TTAGU
Last Answer : b) UAGAC
Description : If one strand of DNA has the nitrogenous base sequence as ATCTC, what would be the complementary RNA strand sequence ? (1) ATCGU (2) TTAGU (3) UAGAC (4) AACTG
Last Answer : (3) UAGAC
Description : Restriction endonucleases recognize and cut a certain sequence of (A) Single stranded DNA (B) Double stranded DNA (C) RNA (D) Protein
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 : 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 : Termination of the synthesis of the RNA molecule is signaled by a sequence in the template strand of the DNA molecule, a signal that is recognized by a termination protein, the (A) Rho (ρ) factor (B) σ factor (C) δ factor (D) ε factor
Description : Which one of the following is the correct sequence for the events of phagocytosis? a. Cell attachment, acidification, phagosome formation, lysosome degradation b. Cell ... attachment, acidification. lysosome degradationd. Cell attachment phagosome formation, lysosome degradation. acidification
Last Answer : Cell attachment, phagosome formation, acidification, lysosome degradation
Description : Which one of the following represents the correct sequence of stages in the life cycle of flukes? a. Cercaria to redia to miracidium to sporocyst b. Miracidium to sporocyst to redia to cercaria c. Metacercaria to redia to cercaria to sporocyst d. Redia to miracidium to metacercaria to cercaria
Last Answer : b. Miracidium to sporocyst to redia to cercaria
Description : are single-stranded DNA molecules that can recognize and bind to a distinctive nucLeotide sequence of a pathogen. a. Prophages b. Plasmids c. Cloning vectors d. DNA probes
Last Answer : d. DNA probes
Description : Which one of the following could NOT cause a change in the mRNA ―reading frame‖? a. Insertion Sequence b. Base-Pair Substitution c. Base Addition d. Base Deletion
Last Answer : b. Base-Pair Substitution
Description : Which one of the following is correct sequence for the flow of electrons in the energy-fixing reactions of photosynthesis? a. Water-photosystem 1-photosystem II-NADPH b. Photosystem I-NADPH-water- ... --- photosystem II------ photosystem I-NADPH d. NADPH-photosystem Il-photosystem I-water
Last Answer : d. NADPH—photosystem Il—photosystem I—water
Description : In DNA sequencing, the primer A.specifies where the sequence ends B.specifies where the sequence begins C.both (a) and (b) D.generates variety of different sized fragments
Last Answer : B.specifies where the sequence begins
Description : Which of the following defines an open reading frame (ORF)? A.A sequence of genome in bacteriophage B.The sequence of a complete genome C.A plasmid vector used in genome sequencing D.A possible gene predicted by DNA sequencing
Last Answer : D.A possible gene predicted by DNA sequencing