Description : Which one of the following statements about the particular entity is true ? (a) Centromere is found in animal cells, which produces aster during cell division. (b) The gene for producing insulin is ... cell. (c) Nucleosome is formed of nucleotides. (d) DNA consists of core of eight histones.
Last Answer : (b) The gene for producing insulin is present in every body cell.
Description : In the bacteria: (1) Mesosome is present (2) Nucleoid represents the genome (3) Ribosomes are found in cytoplasm (4) Histone proteins complexed with DNA
Last Answer : Ans. ((a))
Description : How many of the following is observed in the interphase nucleus ? Chromatid, Nucleosome, Centriole, Nucleouls, Centromere, Kinetochore
Last Answer : How many of the following is observed in the interphase nucleus ? Chromatid, Nucleosome, Centriole, Nucleouls, ... . Three B. One C. Four D. Two
Description : The eukaryotic genome differs from the prokaryotic genome because (a) the DNA is complexed with histone in prokaryotes (b) the DNA is circular and single stranded in prokaryotes (c) repetitive sequences are present in eukaryotes (d) genes in the former case are organised into operons.
Last Answer : (b) the DNA is circular and single stranded in prokaryotes
Description : Number of DNA coils over a nucleosome is
Last Answer : Number of DNA coils over a nucleosome is A. `23/4` B. `21/4` C. `13/4` D. `11/4`
Description : The association of histone H1 with a nucleosome indicates that (a) DNA replication is occurring (b) the DNA is condensed into a chromatin fibre (c) the DNA double helix is exposed (d) transcription is occurring.
Last Answer : (b) the DNA is condensed into a chromatin fibre
Description : The association of histone H1 with a nucleosome indicates: (1) DNA replication is occurring. (2) The DNA is condensed into a Chromatin Fibre. (3) The DNA double helix is exposed. (4) Transcription is occurring.
Last Answer : (2) The DNA is condensed into a Chromatin Fibre.
Description : What types of proteins are involved in the packaging and condensing of DNA into tightly wound nucleosome structures of a chromosome?
Last Answer : Histone
Description : What is the function of histones in DNA packaging? -Biology
Last Answer : answer:
Description : Genetic information originates from (A) Cistron of DNA (B) Codons of mRNA (C) Anticodons of tRNA (D) Histones of nucleoproteins
Last Answer : Answer : A
Description : Nuclear DNA is present in combination with (A) Histones (B) Non-histones (C) Both (A) and (B) (D) None of these
Last Answer : Answer : C
Description : A single DNA molecule condensed into a compact structure in vivo by complexing with accessory histones or histone-like proteins.
Last Answer : Ans. Chromosome
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 : With regard to histones: a. they are basic proteins b. they are essential for the formation of stable DNA c. mitochondria do not contain histones d. all above
Last Answer : all above
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
Description : In prokaryotes, the genetic material is (a) linear DNA without histones (b) circular DNA without histones (c) linear DNA with histones (d) circular DNA with histones.
Last Answer : circular DNA without histones
Description : Genophore/bacterial genome or nucleoid is made of (a) histones and non-histones (b) RNA and histones (c) a single double stranded DNA (d) a single stranded DNA.
Last Answer : c) a single double stranded DNA
Description : Thermococcus, Methanococcus and Methano- bacterium exemplify (a) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria (b) bacteria that ... that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Last Answer : (c) archaebacteria that contain protein homologous to eukaryotic core histones
Description : What is not True for DNA in prokaryotes a) present in the form of a compact structure called nucleoid b) the coils are maintained by non-histone basic proteins c) found in cytoplasm in a supercoiled condition d) packaged as nucleosomes along with histones
Last Answer : b) the coils are maintained by non-histone basic proteins
Description : Which of the following is NOT a component of chromosomes? a) histones b) non-histone proteins c) DNA d) RNA
Last Answer : ANSWER: D -- RNA
Description : The physiologically active form of calcium is (A) Protein bond (B) Ionised (C) Complexed with citrate (D) Complexed with carbonate
Last Answer : Answer : B
Description : During meiosis how cycles of nucleus division, DNA replication and division of centromere take place respectively :-
Last Answer : During meiosis how cycles of nucleus division, DNA replication and division of centromere take place respectively :- ... , Two, One D. Two, One, One
Description : Meiosis II performs (a) separation of sex chromosomes (b) synthesis of DNA and centromere (c) separation of homologous chromosomes (d) separation of chromatids.
Last Answer : d) separation of chromatids.
Description : .Centromere is required for (a) replication of DNA (b) chromosome segregation (c) poleward movement of chromosomes (d) cytoplasmic cleavage.
Last Answer : (c) poleward movement of chromosomes
Description : What is a mesosome? -Biology
Description : What is a mesosome in a prokaryotic cell? -Biology
Description : What are the functions of mesosome prokaryotic cells? -Biology
Description : $ Mesosome is a type of polyribosomes. ! Polyribosomes from a part of the chromosomes.
Last Answer : $ Mesosome is a type of polyribosomes. ! Polyribosomes from a part of the chromosomes. A. If both As and ... is wrong D. If both As and R are wrong.
Description : A particular cell organelle is sometimes referred to as the 'suicide bag' because it contains certain enzymes that can break down the cell components or even the whole cell. Which one of the following is such an organelle? (a) Lysosome (b) Mesosome (c) Phagosome (d) Ribosome
Last Answer : Ans:(d)
Description : Which one of the following structures is an organelle within an organelle? (a) Ribosome (b) Peroxisome (c) ER (d) Mesosome
Last Answer : (a) Ribosome
Description : A cell organelle containing hydrolytic enzymes is (a) lysosome (b) microsome (c) ribosome (d) mesosome.
Last Answer : (c) ribosome
Description : The site of respiration in bacteria is (a) ribosome (b) microsome (c) episome (d) mesosome
Last Answer : (d) mesosome.
Description : Which of the following structures is not found in a prokaryotic cell? (a) Mesosome (b) Plasma membrane (c) Nuclear envelope (d) Ribosome
Last Answer : (c) Nuclear envelope
Description : Which of the following structure is absent in eukaryotic cells? A- Mitochondria B- Chloroplasts C- Golgi structure D- Mesosome
Last Answer : Mesosome
Description : $ Nucleosome is present on the chromosomes. ! A true nucleus is called Eukaryon.
Last Answer : $ Nucleosome is present on the chromosomes. ! A true nucleus is called Eukaryon. A. If both As and R are ... is wrong D. If both As and R are wrong.
Description : Nobody is the name given to (A) Ribosome (B) Microsome (C) Centrosome (D) Nucleosome
Description : Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as (a) polysome (b) polyhedral bodies (c) plastidome (d) nucleosome.
Last Answer : (b) polyhedral bodies
Last Answer : polysome
Description : Nucleosome core is made of (a) H0, H2A, H2B and H3 (b) H1, H2A, H2B, H4 (c) H1, H2A, H2B, H3 and H4 (d) H2A, H2B, H3 and H4.
Last Answer : (d) H2A, H2B, H3 and H4
Description : .Membranous bag with hydrolytic enzymes which is used for controlling intracellular digestion of macromolecules is (a) endoplasmic reticulum (b) nucleosome (c) lysosome (d) phagosome.
Last Answer : (c) lysosome
Description : Microtubules are the constituents of (a) centrioles, spindle fibres and chromatin (b) centrosome, nucleosome and centrioles (c) cilia, flagella and peroxisomes (d) spindle fibres, centrioles and cilia.
Last Answer : (d) spindle fibres, centrioles and cilia
Description : Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as (1) Polysome (2) Polyhedral bodies (3) Plastidome (4) Nucleosome
Last Answer : (1) Polysome
Description : What are the functions of histones? -Biology
Description : What are histones? -Biology
Description : Why are histones positively charged? -Biology
Description : Which of the following are nucleo proteins? (A) Protamines (B) Histones (C) Deoxy and Ribo nucleo proteins (D) All of these
Last Answer : Answer : D
Description : cis-acting elements include (A) Steroid hormones (B) Calcitriol (C) Histones (D) Silencers
Description : Histones are (A) Identical to protamine (B) Proteins rich in lysine and arginine (C) Proteins with high molecular weight (D) Insoluble in water and very dilute acids
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 of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm