Which of the following statements is incorrect? (a) Prions consist of abnormally folded proteins. (b) Viroids lack a protein coat. (c) Viruses are obligate parasites. (d) Infective constituent in viruses is the protein coat.

Which of the following statements is incorrect?
(a) Prions consist of abnormally folded proteins.
(b) Viroids lack a protein coat.
(c) Viruses are obligate parasites.
(d) Infective constituent in viruses is the protein
coat.
by

1 Answer

Answer :

(d) Infective constituent in viruses is the protein
coat.
by

Related questions

Which of the following statements is wrong for viroids? (a) They cause infections. (b) Their RNA is of high molecular weight. (c) They lack a protein coat. (d) They are smaller than viruses

Description : Which of the following statements is wrong for viroids? (a) They cause infections. (b) Their RNA is of high molecular weight. (c) They lack a protein coat. (d) They are smaller than viruses

Last Answer : (b) Their RNA is of high molecular weight.

.Mad cow disease in cattle is caused by an organism which has (a) inert crystalline structure (b) abnormally folded protein (c) free RNA without protein coat (d) free DNA without protein coat.

Description : .Mad cow disease in cattle is caused by an organism which has (a) inert crystalline structure (b) abnormally folded protein (c) free RNA without protein coat (d) free DNA without protein coat.

Last Answer : (b) abnormally folded protein

Which one of the following statements about viruses is correct? (a) Viruses possess their own metabolic system. (b) All viruses contain both RNA and DNA. (c) Viruses are obligate parasites. (d) Nucleic acid of viruses is known as capsid.

Description : Which one of the following statements about viruses is correct? (a) Viruses possess their own metabolic system. (b) All viruses contain both RNA and DNA. (c) Viruses are obligate parasites. (d) Nucleic acid of viruses is known as capsid.

Last Answer : (c) Viruses are obligate parasites.

Attenuated viruses are those that _____. a. can be used to treat viral disease. b. give rise to viroids and prions. c. multiply in cells but at a low rate. d. have been treated with chemicals such as formaldehyde.

Description : Attenuated viruses are those that _____. a. can be used to treat viral disease. b. give rise to viroids and prions. c. multiply in cells but at a low rate. d. have been treated with chemicals such as formaldehyde.

Last Answer : c. multiply in cells but at a low rate.

.Viroids differ from viruses in having (a) DNA molecules without protein coat (b) RNA molecules with protein coat (c) RNA molecules without protein coat (d) DNA molecules with protein coat

Description : .Viroids differ from viruses in having (a) DNA molecules without protein coat (b) RNA molecules with protein coat (c) RNA molecules without protein coat (d) DNA molecules with protein coat

Last Answer : (c) RNA molecules without protein coat

Viroids differ from viruses in having; (1) DNA molecules without protein coat (2) RNA molecules with protein coat (3) RNA molecules without protein coat (4) DNA molecules with protein coat

Description : Viroids differ from viruses in having; (1) DNA molecules without protein coat (2) RNA molecules with protein coat (3) RNA molecules without protein coat (4) DNA molecules with protein coat

Last Answer : (3) RNA molecules without protein coat

Why are viruses called obligate intracellular parasites? -Biology

Description : Why are viruses called obligate intracellular parasites? -Biology

Last Answer : answer:

Which of the following theory is supported by the genomic sequence of the obligate intracellularparasite Rickettsia prowazekii ? A- Parasitic bacteria have very large genomes B- Parasites have a definite genomic sequence similar to viruses C- Mitochondria have evolved from endosymbiotic bacteria D- All bacteria evolved from viruses

Description : Which of the following theory is supported by the genomic sequence of the obligate intracellularparasite Rickettsia prowazekii ? A- Parasitic bacteria have very large genomes B- Parasites have a ... viruses C- Mitochondria have evolved from endosymbiotic bacteria D- All bacteria evolved from viruses

Last Answer : Mitochondria have evolved from endosymbiotic bacteria

Viroids and prions differ in that viroids are believed to contain only ______, while prions are believed to contain only _______. a. carbohydrate; amino acids b. nucleic acid; protein c. amino acids; carbohydrate d. protein; nucleic acid

Description : Viroids and prions differ in that viroids are believed to contain only ______, while prions are believed to contain only _______. a. carbohydrate; amino acids b. nucleic acid; protein c. amino acids; carbohydrate d. protein; nucleic acid

Last Answer : b. nucleic acid; protein

_____ are infectious RNA particles a. Viroids b. Prions c. Virions d. A-C are correct

Description : _____ are infectious RNA particles a. Viroids b. Prions c. Virions d. A-C are correct

Last Answer : a. Viroids

.Which of the following is correct about viroids? (a) They have RNA with protein coat. (b) They have free RNA without protein coat. (c) They have DNA with protein coat. (d) They have free DNA without protein coa

Description : .Which of the following is correct about viroids? (a) They have RNA with protein coat. (b) They have free RNA without protein coat. (c) They have DNA with protein coat. (d) They have free DNA without protein coa

Last Answer : (b) They have free RNA without protein coat.

Which one of the following statements about prions is FALSE? a. Prions are infectious proteins. b. Prions have caused disease in Americans. c. Human disease is called variant CJD. d. Prions can be transmitted to humans from infected beef.

Description : Which one of the following statements about prions is FALSE? a. Prions are infectious proteins. b. Prions have caused disease in Americans. c. Human disease is called variant CJD. d. Prions can be transmitted to humans from infected beef.

Last Answer : d. Prions can be transmitted to humans from infected beef.

Which statement is wrong for viruses? (a) All are parasites. (b) All of them have helical symmetry. (c) They have ability to synthesize nucleic acids and proteins. (d) Antibiotics have no effect on them

Description : Which statement is wrong for viruses? (a) All are parasites. (b) All of them have helical symmetry. (c) They have ability to synthesize nucleic acids and proteins. (d) Antibiotics have no effect on them

Last Answer : (b) All of them have helical symmetry

100. Which statement is wrong for viruses ? (1) Antibiotics have no effect on them (2) All are parasites (3) All of them have helical symmetry (4) They have ability to synthesize nucleic acids and proteins

Description : 100. Which statement is wrong for viruses ? (1) Antibiotics have no effect on them (2) All are parasites (3) All of them have helical symmetry (4) They have ability to synthesize nucleic acids and proteins

Last Answer : All of them have helical symmetry

Ivanowsky, Beijerinck and Reed all began studies with particles smaller than the filters they were working with. This began the study of _____. a. measles b. viruses c. prions d. bacteria

Description : Ivanowsky, Beijerinck and Reed all began studies with particles smaller than the filters they were working with. This began the study of _____. a. measles b. viruses c. prions d. bacteria

Last Answer : b. viruses

How are viroids different from viruses? -Biology

Description : How are viroids different from viruses? -Biology

Last Answer : answer:

Select the wrong statement. (a) The term ‘contagium vivum fluidum’ was coined by M. W. Beijerinck. (b) Mosaic disease in tobacco and AIDS in human being are caused by viruses. (c) The viroids were discovered by D.J. Ivanowsky. (d) W.M. Stanley showed that viruses could be crystallised.

Description : Select the wrong statement. (a) The term ‘contagium vivum fluidum’ was coined by M. W. Beijerinck. (b) Mosaic disease in tobacco and AIDS in human being are caused by viruses. (c) The viroids were discovered by D.J. Ivanowsky. (d) W.M. Stanley showed that viruses could be crystallised.

Last Answer : (c) The viroids were discovered by D.J. Ivanowsky

Exit Criteria may consist of :- i. Thoroughness measures , such as coverage of code, functionality or risk ii. Estimates of Defect density or reliability measures. iii. Residual risk such as defects not fixed or lack of test coverage in certain areas iv. Verifying the Test Environment. a) iv is correct and i,ii,iii are incorrect. b) i,ii,iii is correct and iv is incorrect c) ii is correct and i,ii,iii are incorrect d) iii and iv are correct and i,ii are incorrect

Description : Exit Criteria may consist of :- i. Thoroughness measures , such as coverage of code, functionality or risk ii. Estimates of Defect density or reliability measures. iii. Residual risk such as defects not fixed or ... correct and i,ii,iii are incorrect d) iii and iv are correct and i,ii are incorrect

Last Answer : b) i,ii,iii is correct and iv is incorrect

Viruses have (a) DNA enclosed in a protein coat (b) prokaryotic nucleus(c) single chromosome (d) both DNA and RNA.

Description : Viruses have (a) DNA enclosed in a protein coat (b) prokaryotic nucleus (c) single chromosome (d) both DNA and RNA.

Last Answer : (a) DNA enclosed in a protein coat

Cell membranes a. consist almost entirely of protein molecules b. are impermeable to fat-soluble substances c. in some tissues permit the transport of glucose at a greater rate in the presence of insulin d. are freely permeable to electrolytes but not to proteins e. have a stable composition throughout the life of the cell

Description : Cell membranes a. consist almost entirely of protein molecules b. are impermeable to fat-soluble substances c. in some tissues permit the transport of glucose at a greater rate in the presence of ... to electrolytes but not to proteins e. have a stable composition throughout the life of the cell

Last Answer : in some tissues permit the transport of glucose at a greater rate in the presence of insulin

Antibiotics are products of (a) Bacteria and fungi (b) Fungi and parasites (c) Parasites and bacteria (d) Fungi and viruses

Description : Antibiotics are products of (a) Bacteria and fungi (b) Fungi and parasites (c) Parasites and bacteria (d) Fungi and viruses

Last Answer : (a) Bacteria and fungi

Of the microorganisms, ____ are the greatest threat to food safety. a. viruses c. fungi b. parasites d. bacteria

Description : Of the microorganisms, ____ are the greatest threat to food safety. a. viruses c. fungi b. parasites d. bacteria

Last Answer : d. bacteria

Molds and yeast are classified as ____. a. viruses c. fungi b. parasites d. bacteria

Description : Molds and yeast are classified as ____. a. viruses c. fungi b. parasites d. bacteria

Last Answer : c. fungi

____ are the tiniest, and probably the simplest form of life. a. Viruses c. Fungi b. Parasites d. Bacteria

Description : ____ are the tiniest, and probably the simplest form of life. a. Viruses c. Fungi b. Parasites d. Bacteria

Last Answer : a. Viruses

Mark incorrect option related to Postcard a) Should not be folded, cut or altered and should be sent unenclosed b) Breach the conditions may be treated as letter and postage will be taxed accordingly c) Unpaid and insufficiently paid postcards are forwarded taxed with double the deficiency. d) The amount recovered from sender after the delivery.

Description : Mark incorrect option related to Postcard a) Should not be folded, cut or altered and should be sent unenclosed b) Breach the conditions may be treated as letter and postage will be taxed ... forwarded taxed with double the deficiency. d) The amount recovered from sender after the delivery.

Last Answer : d) The amount recovered from sender after the delivery.

A coiled structure in which peptide bonds are folded in regular manner by (A) Globular proteins (B) Fibrous proteins (C) Both (A) and (B) (D) None of these

Description : A coiled structure in which peptide bonds are folded in regular manner by (A) Globular proteins (B) Fibrous proteins (C) Both (A) and (B) (D) None of these

Last Answer : Answer : A

Globular proteins have completely folded, coiled polypeptide chain and the axial ratio (ratio of length to breadth) is (A) Less than 10 and generally not greater than 3–4 (B) Generally 10 (C) Greater than 10 and generally 20 (D) Greater than 10

Description : Globular proteins have completely folded, coiled polypeptide chain and the axial ratio (ratio of length to breadth) is (A) Less than 10 and generally not greater than 3–4 (B) Generally 10 (C) Greater than 10 and generally 20 (D) Greater than 10

Last Answer : Answer : A

Why are parallel beta sheets less stable than anti-parallel beta sheets in a folded protein molecule?

Description : Why are parallel beta sheets less stable than anti-parallel beta sheets in a folded protein molecule?

Last Answer : Need answer

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 respects. In this regard, which of the following statements is incorrect? (a) Proteins in cell membranes can travel within the lipid bilayer. (b) Proteins can also undergo flip-flop movements in the lipid bilayer. (c) Proteins can remain confined within certain domains of the membrane.(d) Many proteins remain completely embedded within the lipid bilayer.

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.

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 carbohydrates, fats and proteins. (c) Enzymes of electron transport are embedded in outer membrane. (d) Inner membrane is convoluted with infoldings.

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.

Read the statements given below and identify the incorrect statement. a) The human genome contains 3164.7 million nucleotide bases. b) The average gene consists of 30,000 bp c) The total number of genes is estimated at 30,000. d) Chromosome Y has 231 genes e) Less than 2% of the genome codes for proteins.

Description : Read the statements given below and identify the incorrect statement. a) The human genome contains 3164.7 million nucleotide bases. b) The average gene consists of 30,000 bp c) The total number of genes is ... . d) Chromosome Y has 231 genes e) Less than 2% of the genome codes for proteins.

Last Answer : d) Chromosome Y has 231 genes

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

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

Are my examples of obligate and facultative mutualism right?

Description : Are my examples of obligate and facultative mutualism right?

Last Answer : a good one as well?

Bacteria that make either a fementative or respiratory set of enzymes are known as (a) Obligate anacerobes (b) Obligate aerobes (c) Microacerophiles (d) Facultative organisms

Description : Bacteria that make either a fementative or respiratory set of enzymes are known as (a) Obligate anacerobes (b) Obligate aerobes (c) Microacerophiles (d) Facultative organisms

Last Answer : Ans: D

What is meant when it is said that a bacteria is an obligate anaerobe?

Description : What is meant when it is said that a bacteria is an obligate anaerobe?

Last Answer : Obligate anaerobes are those living beings that do not survive in the presence of oxygen. For example, the bacteria Clostridium tetani, agent of tetanus, is an obligate anaerobe. In superficial wounds, it is commom to use hydrogen peroxide to expose anaerobic microorganisms to oxygen and kill them.

Benzimidazoles work against parasites by A A. Binding with protein tubulin B. Mimicking acetylcholine C. Both D. None of above

Description : Benzimidazoles work against parasites by A A. Binding with protein tubulin B. Mimicking acetylcholine C. Both D. None of above

Last Answer : Binding with protein tubuli

What are prions? -Biology

Description : What are prions? -Biology

Last Answer : answer:

Which of the following are the causes of "mad cow disease"? a. Viriods b. Prions c. Virions d. A-C are correct

Description : Which of the following are the causes of "mad cow disease"? a. Viriods b. Prions c. Virions d. A-C are correct

Last Answer : b. Prions

A marketer's advertising platform should consist of issues that are important to consumers. Selling features should not only be important to consumers, but also, if possible, should be features that A)competitive products lack. B)can be seen easily in a photograph. C)are familiar concepts to those in the target market. D)are reasonably inexpensive to develop.

Description : A marketer's advertising platform should consist of issues that are important to consumers. Selling features should not only be important to consumers, but also, if possible, should be features that A ... C)are familiar concepts to those in the target market. D)are reasonably inexpensive to develop.

Last Answer : A)competitive products lack.

Which of the following statement(s) is/are true concerning the cell plasma membrane? a. The plasma membrane is composed of amphipathic molecules b. The hydrophobic core of the lipid bilayer of the cell membrane contains specialized transport proteins which maintain the intracellular ionic milieu different from the extracellular fluid c. Plasma membrane proteins extend externally and bear phospholipid moieties which contribute to the cell coat d. The membrane proteins of nerve cells are highly voltage-dependent

Description : Which of the following statement(s) is/are true concerning the cell plasma membrane? a. The plasma membrane is composed of amphipathic molecules b. The hydrophobic core of the lipid bilayer of the ... contribute to the cell coat d. The membrane proteins of nerve cells are highly voltage-dependent

Last Answer : Answer: a, b, d The plasma membrane defines the boundary of the cell and serves to contain and concentrate enzymes and other macromolecule constituents. The plasma membrane is ... and bear carbohydrate moieties primarily as oligosaccharide chains that contribute to the cell coat or glycocalyx

Which of the following statement is incorrect?  A. The liquid fuels consist of hydrocarbons.  B. The liquid fuels have higher calorific value than solid fuels.  C. The solid fuels have higher calorific value than liquid fuels.  D. A good fuel should have low ignition point.

Description : Which of the following statement is incorrect?  A. The liquid fuels consist of hydrocarbons.  B. The liquid fuels have higher calorific value than solid fuels.  C. The solid fuels have higher calorific value than liquid fuels.  D. A good fuel should have low ignition point.

Last Answer : Answer: C

All the following statements about recognition of a codon on mRNA by an anticodon on tRNA are correct except (A) The recognition of the third base of the codon is not very precise (B) Imprecise recognition of the third base results in wobble (C) Wobble is partly responsible for the degeneracy of the genetic code (D) Wobble results in incorporation of incorrect amino acids in the protein

Description : All the following statements about recognition of a codon on mRNA by an anticodon on tRNA are correct except (A) The recognition of the third base of the codon is not very precise (B) ... degeneracy of the genetic code (D) Wobble results in incorporation of incorrect amino acids in the protein

Last Answer : Answer : D

What is the genetic material in viroids?

Description : What is the genetic material in viroids?

Last Answer : What is the genetic material in viroids?

Who discovered viroids?

Description : Who discovered viroids?

Last Answer : Who discovered viroids?

Write a short note on viroids.

Description : Write a short note on viroids.

Last Answer : Write a short note on viroids.

.Which one of the following pairs is wrongly matched? (a) Ginkgo – Archegonia (b) Salvinia – Prothallus (c) Viroids – RNA (d) Mustard – Synergids

Description : .Which one of the following pairs is wrongly matched? (a) Ginkgo – Archegonia (b) Salvinia – Prothallus (c) Viroids – RNA (d) Mustard – Synergids

Last Answer : (b) Salvinia – Prothallus

Viroids contain a. RNA and DNA. b. Only RNA. c. DNA and a capsid. d. RNA and an envelope.

Description : Viroids contain a. RNA and DNA. b. Only RNA. c. DNA and a capsid. d. RNA and an envelope.

Last Answer : b. Only RNA.