Description : In split genes, the coding sequences are called (a) exons (b) cistrons (c) introns (d) operons
Last Answer : (d) operons.
Description : In split genes, the coding sequences are called (a) exons (b) cistrons (c) introns (d) operons.
Last Answer : (a) exons
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 : 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 : The coding sequences found in split genes are called a) Operons b) introns c) exons d) cistrons
Last Answer : c) exons
Description : mRNA of prokaryotes can code for (A) More than one polypeptide (B) Only one polypeptide (C) Many exons and introns (D) Introns only
Last Answer : Answer : A
Description : Non-coding sequences in a gene are known as (A) Cistrons (B) Nonsense codons (C) Introns (D) Exons
Last Answer : Answer : C
Description : DNA elements, which can switch their position, are called (a) cistrons (b) transposons (c) exons (d) introns.
Last Answer : (b) transposons
Description : Removal of introns and joining of exons in a defined order during transcription is called (a) looping (b) inducing (c) slicing (d) splicing
Last Answer : (a) looping
Description : True statements about the nucleic acid include: a. contains purine and pyrimidine which are bound together by covalent bonds b. there is always an equal concentration of purine and pyrimidine c. in RNA, ... d. introns is more common than exons on the DNA e. the histones mark the excision site
Last Answer : there is always an equal concentration of purine and pyrimidine
Last Answer : d) splicing.
Description : In bacteria a group of genes located together and functioning together on a chromosome are called _____. a. polysome b. operon c. polymerase d. exons
Last Answer : b. operon
Description : Introns in genes (A) Encode the amino acids which are removed during post-translational modification (B) Encode signal sequences which are removed before secretion of the proteins (C) Are the non-coding sequences which are not translated (D) Are the sequences that intervene between two genes
Description : In the regulation of genes: a. more than 90% of the base sequences in human DNA have not known function b. extrons are the part of the gene that code for amino acids found in the final proteins. c. introns usually begins with the nucleotide sequence GT d. all above
Last Answer : all above
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 : Lac operon of E. coli contains _______ is continuity. (A) Regulator and operator genes only (B) Operator and structural genes only (C) Regular and structural genes only (D) Regulator, operator and structural genes
Description : The coding sequences in lac operon include (A) i gene (B) i gene, operator locus and promoter (C) z, y and a genes (D) i, z, y and a genes
Description : Transcription of structural genes of lac operon is prevented by binding of the repressor tetramer to (A) i gene (B) Operator locus (C) Promoter (D) z gene
Last Answer : Answer : B
Description : Lac operon is a cluster of (A) Three structural genes (B) Three structural genes and their promoter (C) A regulatory gene, an operator and a promoter (D) A regulatory gene, an operator, a promoter and three structural genes
Description : Which one of the following is wrongly matched? (a) Transcription - Writing information from DNA to tRNA. (b) Translation - Using information in mRNA to make protein. (c) Repressor protein - Binds to operator to stop enzyme synthesis. (d) Operon - Structural genes, operator and promoter.
Last Answer : (c) Repressor protein - Binds to operator to stop enzyme synthesis.
Description : .All of the following are part of an operon except (a) an operator (b) structural genes (c) an enhancer (d) a promoter.
Last Answer : d) a promoter.
Description : Genes that are involved in turning on or off the transcription of a set of structural genes are called (a) redundant genes (b) regulatory genes (c) polymorphic genes (d) operator genes.
Last Answer : (d) operator genes.
Last Answer : (d) Operon - Structural genes, operator and promoter
Description : All of the following are part of an operon except (a) an operator (b) structural genes (c) an enhancer (d) a promoter.
Last Answer : (c) an enhancer
Description : Which one of the following is NOT part of an operon? a. Regulatory gene b. Operator c. Promoter d. Structural genes
Last Answer : d. Structural genes
Description : Transfer of genes (gene flow) in between different species is known as (a) Vertical gene flow (b) Horizontal gene flow (c) Lateral gene flow (d) Side gene flow
Last Answer : (b) Horizontal gene flow
Description : he molecular scissors use3d to cut DNA into specific genes of interest are called (a) Exonucleases (b) Restriction endonucleases (c) Ligases (d) Polymerases
Last Answer : (b) Restriction endonucleases
Description : The main reason of Irish Famine in Potato was—(A) Late Blight disease (B) Bacterial Blight disease (C) Blast disease (D) Ear Cockle disease
Last Answer : (A) Late Blight disease
Description : Bacteriophage virus is the a. Algal virus b. Fungal Virus c. Bacterial virus d. Protozoal virus
Last Answer : c. Bacterial virus
Description : What is the lack of root growth ?
Last Answer : Root growth is reduced due to lack of nitrogen.
Description : What Makes Meat Lack ?
Last Answer : Lamb meat makes up for the lack of protein.
Description : When is the lack of grass seen ?
Last Answer : Lack of grass is seen in winter.
Description : Indian agriculture is facing the following major problems. Which is NOT CORRECT? (a) Land degradation (b) Rising population (c) Lack of bullock power (d) Stagnant cultivable area
Last Answer : (c) Lack of bullock power
Description : Major cause of mango fruit drop is ___ A) Lack of pollination B) Low stigmatic receptivity C) Defective perfect flower D) All of the above
Last Answer : D) All of the above
Description : Which of the following organelle lack membrane? (a) Mitochondria (b) Ribosomes (c) Microtubules(d) Peroxisomes
Last Answer : (b) Ribosomes
Description : Interferon (A) Is virus specific (B) Is a bacterial product (C) Is a synthetic antiviral agent (D) Requires expression of cellular genes
Description : Proto-oncogenes are: B A. DNA sequences in cells that are oncogenes themselves B. Cellular copies of genes that were first found in oncogenic retroviruses C. DNA viral sequences that are known to infect human cells D. Bacterial DNA counterparts
Last Answer : Cellular copies of genes that were first found in oncogenic retroviruses
Description : Genes are packaged into a bacterial chromosome by (a) acidic protein (b) actin (c) histones (d) basic protein.
Last Answer : basic protein
Description : Which statement is correct for bacterial transduction? (a) Transfer of some genes from one bacteria to another bacteria through virus. (b) Transfer of genes from one bacteria to another bacteria ... its DNA directly from mother cell. (d) Bacteria obtained DNA from other external source.
Last Answer : (a) Transfer of some genes from one bacteria to another bacteria through virus.
Last Answer : (a) Transfer of some genes from one bacteria to another bacteria through virus
Description : Transposons are of particular significance because they a. often contain genes for antibiotic resistance. b. inhibit the effects of overlapping genes. c. come in pairs and often are associated with viruses. d. regulate gene transcription in bacterial cells.
Last Answer : a. often contain genes for antibiotic resistance.
Description : Which one of the following statements is NOT true of the bacterial chromosome? a. It Is Located In The Nucleoid. b. It Usually Isa Single, Circular Molecule. c. Some Genes Are Dominant To Others. d. It Usually Is Haploid.
Last Answer : c. Some Genes Are Dominant To Others.
Description : Plasmids a. Replicate with the bacterial chromosome. b. Contain essential growth information. c. May contain antibiotic resistance genes. d. Are as large as the bacterial chromosome.
Last Answer : c. May contain antibiotic resistance genes.
Description : Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to (a) repulsion (b) recombination (c) linkage (d) crossing over.
Last Answer : (c) linkage
Description : Under certain circumstances, the gut may become a source of sepsis and serve as the motor of systemic inflammatory response syndrome. Microbial translocation is the process by which microorganisms ... intestinal mucosal permeability c. Decreased host defense mechanisms d. Lack of enteral feeding
Last Answer : Answer: a, b, c, d 99 Translocation is promoted in three general ways: 1) altered permeability of the intestinal mucosa as caused by shock, sepsis, distant injury, or cell toxins; 2) ... trauma patient d. Fifty percent of non-nitrogen caloric requirements should be provided in the form of fat
Description : Rapid bacterial growth phase is known as a. Log b. Lag c. Lack d. None of these
Last Answer : Ans: A
Description : Heart attack occurs due to : (1) Bacterial attack on the heart (2) Stopping of heart beat (3) Lack of blood supply to the heart itself (4) Impairment of heart’s working due to unknown reasons
Last Answer : (3) Lack of blood supply to the heart itself Explanation: A heart attack occurs if the flow of oxygen-rich blood to a section of heart muscle suddenly becomes blocked. If blood) flow isn' ... plaque (plak) builds up inside the coronary arteries. These arteries supply oxygen-rich blood to the heart.
Description : Heart attack occurs due to – (1) Bacterial attack on the heart (2) Stopping of heart beat (3) Lack of supply of blood to the heart itself (4) Impairment of heart's working due to unknown reasons
Last Answer : (3) Lack of supply of blood to the heart itself Explanation: A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged ... to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.