Description : Nonsense codons bring about (A) Amino acid activation (B) Initiation of protein synthesis (C) Termination of protein synthesis (D) Elongation of polypeptide chains
Last Answer : Answer : C
Description : All of the following statements about nonsense codons are true except (A) They do not code for amino acids (B) They act as chain termination signals (C) They are identical in nuclear and mitochondrial DNA (D) They have no complementary anticodons
Description : Which one of the following codons would terminate translation? a. AUG b. UUU c. UAA d. UGG
Last Answer : c. UAA
Description : Non-coding sequences in a gene are known as (A) Cistrons (B) Nonsense codons (C) Introns (D) Exons
Description : Nonsense codons are present on (A) mRNA (B) tRNA (C) rRNA (D) None of these
Last Answer : Answer : A
Description : .In the genetic dictionary, there are 64 codons as (a) 64 amino acids are to be coded (b) 64 types of tRNAs are present (c) there are 44 nonsense codons and 20 sense codons (d) genetic code is triplet.
Last Answer : (c) there are 44 nonsense codons and 20 sense codons
Description : In the genetic dictionary, there are 64 codons as (a) 64 amino acids are to be coded (b) 64 types of tRNAs are present (c) there are 44 nonsense codons and 20 sense codons (d) genetic code is triplet
Last Answer : genetic code is triplet
Description : The final step of gene expression is protein synthesis, which is also known as A- replication B- translation C- transcription D- none of these
Last Answer : translation
Description : Which of the following three codons translate as serine (Ser)? A- AGU B- CGA C- CAU D- AUG
Last Answer : AGU
Description : The codons causing chain termination are (a) AGT, TAG, UGA (b) UAG, UGA, UAA (c) TAG, TAA, TGA (d) GAT, AAT, AGT
Last Answer : (b) UAG, UGA, UAA
Last Answer : b) UAG, UGA, UAA
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 : The nonsense codon(s) is/are A-UAG B-UAA C-UGA D-all of these
Last Answer : all of these
Description : Ribosomes match up the ______ of the mRNA and the ______ of the tRNAs. a. codons; anticodons b. introns; exons c. anticodons; codons d. genes; anticodons
Last Answer : a. codons; anticodons
Description : A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called A.activation B.attenuation C.corepression D.desiccation
Last Answer : B.attenuation
Description : Which of the termination codon is called amber? A- UAA B- UAG C- UGA D- AUG
Last Answer : UAG
Description : A part of an mrna has the base sequence gca. which change to this sequence would indicate a missense mutation?
Last Answer : A missense mutation is the change in a single nucleotide that results in a different amino acid being coded for. GCA codes for the amino acid Alanine. Therefore any of the following changes would be missense ... acid GUA -> Valine GGA -> Glycine CCA -> Proline UCA -> Serine ACA -> Threonine
Description : Mutations in promoter regions of genes can cause (A) Premature termination of translation (B) Change in reading frame of downstream structural gene (C) Decreased efficiency of transcription (D) All of these
Description : Insertion of a base in a gene can cause (A) Change in reading frame (B) Garbled amino acid sequence in the encoded protein (C) Premature termination of translation (D) All of these
Last Answer : Answer : D
Description : mRNA is complementary copy of (A) 5′-3′ strand of DNA+ (B) 3′-5′ strand of DNA (C) Antisense strand of DNA (D) tRNA
Last Answer : Answer : B
Description : Tetracyclines interfere with a. Translation. b. Transcription. c. Dna Replication. d. Membrane Function.
Last Answer : a. Translation.
Description : Which of the following is NOT a type of horizontal gene transfer between bacterial cells? a. transformation b. conjugation c. transduction d. translation
Last Answer : d. translation
Description : Which one of the following statements is true? a. Plasmids are circular molecules of RNA. b. RNA replicates by a conservative method of replication. c. Deletions or insertions of a ... reading frameshift during translation. d. Okazaki fragments are removed from a RNA before translation occurs.
Last Answer : c. Deletions or insertions of a nucleotide in a gene will cause a reading frameshift during translation.
Description : A ______ can move a part of DNA to another place on the chromosome. a. translation. b. transferon c. transposon d. transition e. transcription
Last Answer : c. transposon
Description : What happens at the ribosome in the production of a protein? a. mRNA brings the codon b. tRNA brings the anticodon c. the amino acids are linked by polypeptide bonds d. translation e. all the above
Last Answer : c. the amino acids are linked by polypeptide bonds
Description : What is the process called of making a mRNA copy of DNA? a. translation. b. transcription. c. transposon d. transformation
Last Answer : b. transcription.
Description : If an antibiotic binds to a 50S subunit, what cellular process will be inhibited? a. DNA replication b. Intron excision c. Translation d. Transcription
Last Answer : c. Translation
Description : The translation of a mRNA by multiple ribosomes is called formation. a. Okazaki b. Polysome c. Plasmid d. Transposon
Last Answer : b. Polysome
Description : A characteristic of protein synthesis in both the archaea and eukarya is A.transcription and translation are coupled B.translation is inhibited by diphtheria toxin C.proteins are synthesized from D-, ... L-, isomers of amino acids D.the initiator tRNA is charged with N-formyl- methionine
Last Answer : C.proteins are synthesized from
Description : Which of the following transport bacterial DNA to other bacteria via bacteriophages? A- Conjugation B- Transduction C- Transformation D- Translation
Last Answer : Transduction
Description : A characteristic of protein synthesis in both the archaea and eukarya is A- transcription and translation are coupled B- translation is inhibited by diphtheria toxin C- .proteins are synthesized from D-, rather than L-, isomers of amino acids D- the initiator tRNA is charged with N-formyl-methionine
Last Answer : .proteins are synthesized from D-, rather than L-, isomers of amino acids
Last Answer : Lop Of signs In the case Stop Needed No.
Description : : _____ is an exaggerated or inappropriate immune defense that is causing the problems in an affected individual. a. Hypersensitivity b. Autoimmune disease c. AIDS d. HIV
Last Answer : a. Hypersensitivity
Description : An HIV patient with swollen lymph nodes and CD4 T cell count of would be in stage of HIV disease/AIDS. a. 1,000; stage II b. 700; stage I c. 400; stage III d. 400; stage IV
Last Answer : a. 1,000; stage II
Description : ______ infections are more common in AIDS or cancer patients. a. Indigenous b. Opportunistic c. Primary d. Secondary
Last Answer : b. Opportunistic
Description : Which one of the following protozoa would most likely be isolated in an individual with AIDS? a. Cryptosporidium b. Balantidium c. Babesia d. Leishmania
Last Answer : a. Cryptosporidium
Description : Which of the following fungi would most likely be seen in an individual with AIDS? a. Cryptococcus neoformans b. Sporothrix schenkii c. Trichophyton d. Microsporum
Last Answer : a. Cryptococcus neoformans
Description : What is the most common sexually transmitted infection in the United States? a. Chlamydia b. Gonorrhea c. Syphilis d. AIDS
Last Answer : a. Chlamydia
Description : The development of global regulatory systems in prokaryotes A- determines the exact location of the cell on the globe B- aids in DNA replication C- .determines the exact location of the replication site D- regulates many genes under varying environmental conditions
Last Answer : regulates many genes under varying environmental conditions
Description : Which one of the following is NOT considered an emerging infectious disease? a. Polio b. Hantavirus pulmonary disease c. Lyme disease d. AIDS
Last Answer : c. Lyme disease
Description : Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid? (a) AUG, ACG - Start/methionine (b) UUA, UCA - Leucine (c) GUU, GCU - Alanine (d) UAG, UGA - Stop
Last Answer : (b) UUA, UCA - Leucine
Last Answer : (d) UAG, UGA - Stop
Description : The stretch of codons between AUG and a stop codon is called a) open reading frame b) TATA box c) colinearity d) degenerate
Last Answer : a) open reading frame
Description : Peptidoglycan is also known as A- N-acetyl muramic acid B- mureinmucopeptide C- N acetylglucosamine D- mesodiaminopimetic acid
Last Answer : mureinmucopeptide
Description : Difference between termination signal and stop codon. -Biology
Last Answer : answer:
Description : Synthesis of DNA is also known as (A) Duplication (B) Replication (C) Transcription (D) Translation
Description : During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, from which
Last Answer : During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three ... C. UAG, UGA, UAA D. UUG, UCA, UCG
Description : Which of the following statement(s) is/are true concerning DNA? a. DNA is contained only in the nucleus of the cell b. DNA strands are encoded by the sequence of four bases-adenine, guanine, cytosine ... DNA is the intron, a sequence of three bases d. There are an infinite number of possible codons
Last Answer : Answer: a The genetic blueprint of an organism is carried in the nucleus of every cell, encoded by the sequence of four bases-adenine, guanine, cytosine and thymine, which together make up ... codons. Sixty-one of these code for amino acids and three are termination signals called stop codons