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

1 Answer

Answer :

all above

Related questions

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 true for eukaryotic cells? A- Nucleus is bounded by nuclear membrane B- Chromosomes contain histones C- Chloroplasts and mitochondria contains 70S ribosomes D- Gas vacuoles are present

Last Answer : Gas vacuoles are present

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 : 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 : With regard to DNA molecules: a. they contain adenine, cytosine, guanine and uracil bases b. they can be detected with Western blotting c. they can be detected with Southern blotting d. they are denatured at temperature of 1000C

Last Answer : they can be detected with Southern blotting

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 : 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

Last Answer : Answer : B

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

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 : 80S ribosomes are distributed in cytoplasm

Description : Mitochondria and chloroplast are (A) semi-autonomous organelles (B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery. Which one of the following options is correct? (a) ( ... Both (A) and (B) are correct. (d) (B) is true but (A) is false.

Last Answer : (a) (A) is true but (B) is false.

Description : Which of the following statements regarding mitochondria is incorrect? (a) Mitochondrial matrix contains single circular DNA molecule and ribosomes. (b) Outer membrane is permeable to monomers of ... transport are embedded in outer membrane. (d) Inner membrane is convoluted with infoldings.

Last Answer : (c) Enzymes of electron transport are embedded in outer membrane.

Description : Genes are packaged into a bacterial chromosome by (a) acidic protein (b) actin (c) histones (d) basic protein.

Last Answer : basic protein

Description : Select the wrong statement from the following. (a) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane. (b) Both chloroplasts and ... mitochondria. (d) Both chloroplasts and mitochondria contain an inner and an outer membrane.

Last Answer : (a) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane.

Description : Which of the following pairs of organelles does not contain DNA? (a) Nuclear envelope and Mitochondria (b) Mitochondria and Lysosome (c) Chloroplast and Vacuoles (d) Lysosomes and Vacuoles

Last Answer : (d) Lysosomes and Vacuoles

Description : Which organelle has been shown to contain DNA? a) Ribosome b) Mitochondria c) Golgi Apparatus d) none of the above

Last Answer : ANSWER: B -- MITOCHONDRIA

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 : 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 : An octamer of 4 histones complexed with DNA forms (a) endosome (b) nucleosome (c) mesosome (d) centromere.

Last Answer : (b) nucleosome

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 : 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 : 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 : The following contain basic principles, essential procedures and related guidance, consistent with the concepts in the Framework, for the performance of assurance engagements, except a. PSAs b. PSREs c. PSAEs d. PSRSs

Last Answer : PSRSs

Description : Which of the following statements concerning platelets is INCORRECT. Platelets: a) contain DNA b) are roughly disk-shaped c) have little ability to synthesize proteins d) are between 1/2 and 1/3 the diameter of the red cell

Last Answer : ANSWER: A -- contain DNA

Description : With regard to HLA class 1 antigen: a. they are expressed on all nucleated cells b. they are essential for viral antigen recognition by cytotoxic cells c. the genes for HLA class 1 molecules are located on chromosome 6 and 15 d. all above

Last Answer : all above

Description : It is essential that users regard CPA firms as a. Competent. b. Unbiased. c. Technically proficient. d. All of the above

Last Answer : All of the above

Description : It is essential that users regard CPA firms as: a. Competent. b. Unbiased. c. Technically proficient. d. All of the above

Last Answer : All of the above

Description : Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following ... are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Last Answer : Answer: a, b, d Penicillins, cephalosporins, and monobactams possess a b-lactam ring of some type and act to bind bacterial division plate proteins, thus inhibiting cell wall ... act in different mechanisms to inhibit protein synthesis, therefore two agents in combination act synergistically

Description : According to widely accepted fluid mosaic model cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several ... domains of the membrane. (d) Many proteins remain completely embedded within the lipid bilayer.

Last Answer : (b) Proteins can also undergo flip-flop movements in the lipid bilayer.

Description : Proteins that are destined to be secreted from the cells must pass through a series of organelles. These organelles include: a. Endoplasmic reticulum b. Golgi apparatus c. Mitochondria d. Lysosomes

Last Answer : Answer: a, b, d Proteins targeted for the secretory pathway most commonly begin with translocation from the cytoplasm across the lipid bilayer into the lumen of the endoplasmic reticulum. It ... apparatus where they are further processed and sorted and end up in a secretory vesicle or lysosome

Description : Proteins are synthesized in— (A) Centrosomes (B) Ribosomes (C) Mitochondria (D) Golgi bodies

Last Answer : (B) Ribosomes

Description : The middle piece of the sperm contains (a) proteins (b) mitochondria (c) centriole (d) nucleus.

Last Answer : (b) mitochondria

Description : The proteins are synthesised at (a) centrosomes (b) Golgi bodies (c) ribosomes (d) mitochondria.

Last Answer : (c) ribosomes

Description : The main organelle involved in modification and outing of newly synthesized proteins to their destinations is (a) chloroplast (b) mitochondria (c) lysosome (d) endoplasmic reticulum.

Last Answer : (d) endoplasmic reticulum.

Description : Many globular proteins are stable in solution although they lack in (A) Hydrogen bonds (B) Salt bonds (C) Non-polar bonds (D) Disulphide bonds

Last Answer : Answer : D

Description : Many globular proteins are stable in solution inspite they lack in (A) Disulphide bonds (B) Hydrogen bonds (C) Salt bonds (D) Non polar bonds

Last Answer : Answer : A

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 : Identify the correct statement with regard to the act of union from the following options a. The British monarchy surrendered the power to English parliament. b. The British parliament seized power from Ireland. c ... . d. The British nation was formed as are result of a war with Scotland and Wales.

Last Answer : c. The formation of the United Kingdom of Great Britain.

Description : 1. Which of the statements with regard to formation is correct (1) One of the Functions of the formation is to facilitate drainage (2) Width of bank for double railway line is 12.155 meters (3) Width of cutting for double railway track is 11. ... a) 2, 3, 5 b) 3, 4, 5* c) 2, 3, 4 d) 2, 4, 5

Last Answer : b) 3, 4, 5*

Description : When viewed under a microscope a sample of tissue reveals striations and long thin fibers that contain many nuclei and mitochondria. What type of tissue is most likely being viewed?

Last Answer : Need answer

Description : Cells contain smaller parts known as organelles. The nucleus, chloroplasts, mitochondria, and vacuoles are all examples of organelles. What do these organelles have in common?

Last Answer : They are all enclosed by a membrane.

Description : Name the prokaryotic organism which does not contain mitochondria?

Last Answer : Ans. Bacteria

Description : Which of the following organelle of the cell contain their own genetic material? (1) Mitochondria (2) Ribosomes (3) Golgi complex (4) None of the above

Last Answer : (1) Mitochondria Explanation: Nucleus is the central organelle of the cell which encloses the DNA. Apart from the nucleus, there are few other organelles which have their own DNA.

Description : RBCs do not perform aerobic respiration because these do not contain - (1) Mitochondria (2) Nucleus (3) Endoplasmic Reticulum (4) Lysosomes

Last Answer : (1) Mitochondria Explanation: Red Blood Corpusles (RBCs) do not contain Mitochondria.

Description : The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent

Last Answer : spontaneous muscle contraction

Description : Red blood cells: a. measured 15 um in diameter b. do not contain mitochondria c. have a life span of 120 days in the circulation d. are released from the bone marrow as mature erythrocytes

Last Answer : do not contain mitochondria

Description : The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent

Last Answer : spontaneous muscle contraction