Proto-oncogens are present in (A) Oncoviruses (B) Cancer cells (C) Healthy human cells (D) Prokaryotes

Proto-oncogens are present in (A) Oncoviruses (B) Cancer cells (C) Healthy human cells (D) Prokaryotes
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The only correct statement about oncoviruses is (A) All the oncoviruses are RNA viruses (B) Reverse transcriptase is present in all oncoviruses (C) Viral oncogenes are identical to human protooncogens (D) Both DNA and RNA viruses can be oncoviruses

Description : The only correct statement about oncoviruses is (A) All the oncoviruses are RNA viruses (B) Reverse transcriptase is present in all oncoviruses (C) Viral oncogenes are identical to human protooncogens (D) Both DNA and RNA viruses can be oncoviruses

Last Answer : Answer : D

All the following statements about protooncogenes are true except (A) They are present in human beings (B) They are present in healthy cells (C) Proteins encoded by them are essential (D) They are expressed only when a healthy cell has been transformed into a cancer cell

Description : All the following statements about protooncogenes are true except (A) They are present in human beings (B) They are present in healthy cells (C) Proteins encoded by them are essential (D) They are expressed only when a healthy cell has been transformed into a cancer cell

Last Answer : Answer : D

Various oncogens may encode all of the following except: (A) Carcinogens (B) Growth factors (C) Receptors for growth factors (D) Signal transducers for growth factors

Description : Various oncogens may encode all of the following except: (A) Carcinogens (B) Growth factors (C) Receptors for growth factors (D) Signal transducers for growth factors

Last Answer : Answer : A

Which of the following statements is not true for cancer cells in relation to mutations? (a) Mutations inactivate the cell control. (b) Mutations inhibit production of telomerase. (c) Mutations in proto-oncogenes accelerate the cell cycle. (d) Mutations destroy telomerase inhibitor.

Description : Which of the following statements is not true for cancer cells in relation to mutations? (a) Mutations inactivate the cell control. (b) Mutations inhibit production of telomerase. (c) Mutations in proto-oncogenes accelerate the cell cycle. (d) Mutations destroy telomerase inhibitor.

Last Answer : (b) Mutations inhibit production of telomerase

Ames assay is a rapid method for detection of (A) Oncoviruses (B) Retroviuses (C) Chemical carcinogens (D) Typhoid

Description : Ames assay is a rapid method for detection of (A) Oncoviruses (B) Retroviuses (C) Chemical carcinogens (D) Typhoid

Last Answer : Answer : C

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

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

In eukaryotic cells (A) Formylated tRNA is important for initiation of translation (B) Cyclohexamide blocks elongation during translation (C) Cytosolic ribosomes are smaller than those found in prokaryotes (D) Erythromycin inhibits elongation during translation

Description : In eukaryotic cells (A) Formylated tRNA is important for initiation of translation (B) Cyclohexamide blocks elongation during translation (C) Cytosolic ribosomes are smaller than those found in prokaryotes (D) Erythromycin inhibits elongation during translation

Last Answer : Answer : B

Some DNA is present in mitochondria of (A) Prokaryotes (B) Eukaryotes (C) Both (A) and (B) (D) None of these

Description : Some DNA is present in mitochondria of (A) Prokaryotes (B) Eukaryotes (C) Both (A) and (B) (D) None of these

Last Answer : Answer : B

RB 1 gene is (A) A tumour suppressor gene (B) Oncogene (C) Proto-oncogene (D) Activated proto-oncogene

Description : RB 1 gene is (A) A tumour suppressor gene (B) Oncogene (C) Proto-oncogene (D) Activated proto-oncogene

Last Answer : Answer : A

Retinoblastoma can result from a mutation in (A) ras proto-oncogene (B) erbB proto-oncogene (C) p 53 gene (D) RB 1 gene

Description : Retinoblastoma can result from a mutation in (A) ras proto-oncogene (B) erbB proto-oncogene (C) p 53 gene (D) RB 1 gene

Last Answer : Answer : D

P 53 gene: (A) A proto-oncogene (B) An oncogene (C) A tumour suppressor gene (D) None of these

Description : P 53 gene: (A) A proto-oncogene (B) An oncogene (C) A tumour suppressor gene (D) None of these

Last Answer : Answer : C

Ras proto-oncogene encodes (A) Epidermal growth factor (EGF) (B) Receptor for EGF (C) Signal transducer for EGF (D) Nuclear transcription factor

Description : Ras proto-oncogene encodes (A) Epidermal growth factor (EGF) (B) Receptor for EGF (C) Signal transducer for EGF (D) Nuclear transcription factor

Last Answer : Answer : C

Ras proto-oncogene is converted into oncogene by (A) A point mutation (B) Chromosomal translocation (C) Insertion of a viral promoter upstream of the gene (D) Gene amplification

Description : Ras proto-oncogene is converted into oncogene by (A) A point mutation (B) Chromosomal translocation (C) Insertion of a viral promoter upstream of the gene (D) Gene amplification

Last Answer : Answer : A

What do eukaryotes cells have that prokaryotes don't?

Description : What do eukaryotes cells have that prokaryotes don't?

Last Answer : Need answer

Select the mismatch. (a) Gas vacuoles – Green bacteria (b) Large central vacuoles – Animal cells (c) Protists – Eukaryotes (d) Methanogens – Prokaryotes

Description : Select the mismatch. (a) Gas vacuoles – Green bacteria (b) Large central vacuoles – Animal cells (c) Protists – Eukaryotes (d) Methanogens – Prokaryotes

Last Answer : (b) Large central vacuoles – Animal cells

What is a difference between prokaryotic and eukaryotic cells in making protein? a. Eukayotes have introns that stay inside the nucleus b. Prokaryotes can transcribe and translate at the same time c. the process is faster in prokaryotes d. A-C are correct

Description : What is a difference between prokaryotic and eukaryotic cells in making protein? a. Eukayotes have introns that stay inside the nucleus b. Prokaryotes can transcribe and translate at the same time c. the process is faster in prokaryotes d. A-C are correct

Last Answer : d. A-C are correct

Eukaryotic cell organelles first emerged A.from a specialized lineage of cells within the kingdom Protista B.when prokaryotes engulfed each other and became interdependent C.when bacteria made their first attempts at reproduction D.just before the origin of the animal and fungal kingdoms

Description : Eukaryotic cell organelles first emerged A.from a specialized lineage of cells within the kingdom Protista B.when prokaryotes engulfed each other and became interdependent C.when bacteria made their first attempts at reproduction D.just before the origin of the animal and fungal kingdoms

Last Answer : B.when prokaryotes engulfed each other and became interdependent

What is evidence for the endosymbiotic theory? a. Ribosomes are the same size in eukaryotes and prokaryotes b. Organelles like mitochondria and cholorplasts have their own dna and ribosomes c. Flagella are the same in both types of cells d. A-C are correct

Description : What is evidence for the endosymbiotic theory? a. Ribosomes are the same size in eukaryotes and prokaryotes b. Organelles like mitochondria and cholorplasts have their own dna and ribosomes c. Flagella are the same in both types of cells d. A-C are correct

Last Answer : b. Organelles like mitochondria and cholorplasts have their own dna and ribosomes

$ In prokaryotes, there is present a ring shaped chromosome. ! The ring shaped chromosome is called Eukaryotic Nucleus.

Description : $ In prokaryotes, there is present a ring shaped chromosome. ! The ring shaped chromosome is called Eukaryotic Nucleus.

Last Answer : $ In prokaryotes, there is present a ring shaped chromosome. ! The ring shaped chromosome is called Eukaryotic ... D. If both As and R are wrong.

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.

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

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

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

mRNA of prokaryotes can code for (A) More than one polypeptide (B) Only one polypeptide (C) Many exons and introns (D) Introns only

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

All of the following statements about puromycin are true except (A) It is an alanyl tRNA analogue (B) It causes premature termination of protein synthesis (C) It inhibits protein synthesis in prokaryotes (D) It inhibits protein synthesis in eukaryotes

Description : All of the following statements about puromycin are true except (A) It is an alanyl tRNA analogue (B) It causes premature termination of protein synthesis (C) It inhibits protein synthesis in prokaryotes (D) It inhibits protein synthesis in eukaryotes

Last Answer : Answer : A

Puromycin causes premature chain termination in (A) Prokaryotes (B) Eukaryotes (C) Both (A) and (B) (D) None of these

Description : Puromycin causes premature chain termination in (A) Prokaryotes (B) Eukaryotes (C) Both (A) and (B) (D) None of these

Last Answer : Answer : C

Binding of formylmehtionyl tRNA to 30 S ribosomal subunit of prokaryotes is inhibited by (A) Streptomycin (B) Chloramphenicol (C) Erythromycin (D) Mitomycin

Description : Binding of formylmehtionyl tRNA to 30 S ribosomal subunit of prokaryotes is inhibited by (A) Streptomycin (B) Chloramphenicol (C) Erythromycin (D) Mitomycin

Last Answer : Answer : A

The first amino acyl tRNA which initiates translation in prokaryotes is (A) Mehtionyl tRNA (B) Formylmethionyl tRNA (C) Tyrosinyl tRNA (D) Alanyl tRNA

Description : The first amino acyl tRNA which initiates translation in prokaryotes is (A) Mehtionyl tRNA (B) Formylmethionyl tRNA (C) Tyrosinyl tRNA (D) Alanyl tRNA

Last Answer : Answer : B

A polycistronic mRNA can be seen in (A) Prokaryotes (B) Eukaryotes (C) Mitochondria (D) All of these

Description : A polycistronic mRNA can be seen in (A) Prokaryotes (B) Eukaryotes (C) Mitochondria (D) All of these

Last Answer : Answer : A

Ciprofloxacin inhibits the synthesis of (A) DNA in prokaryotes (B) DNA in prokaryotes and eukaryotes (C) RNA in prokaryotes (D) RNA in prokaryotes and eukaryotes

Description : Ciprofloxacin inhibits the synthesis of (A) DNA in prokaryotes (B) DNA in prokaryotes and eukaryotes (C) RNA in prokaryotes (D) RNA in prokaryotes and eukaryotes

Last Answer : Answer : A

α-Amanitin inhibits (A) DNA polymerase II of prokaryotes (B) DNA polymerase α of eukaryotes (C) RNA polymerase II of eukaryotes (D) RNA-dependent DNA polymerase

Description : α-Amanitin inhibits (A) DNA polymerase II of prokaryotes (B) DNA polymerase α of eukaryotes (C) RNA polymerase II of eukaryotes (D) RNA-dependent DNA polymerase

Last Answer : Answer : C

In prokaryotes, the ribosomal subunits are (A) 30 S and 40 S (B) 40 S and 50 S (C) 30 S and 50 S (D) 40 S and 60 S

Description : In prokaryotes, the ribosomal subunits are (A) 30 S and 40 S (B) 40 S and 50 S (C) 30 S and 50 S (D) 40 S and 60 S

Last Answer : Answer : C

In prokaryotes, chloramphenicol (A) Causes premature release of the polypeptide chain (B) Causes misreading of the mRNA (C) Depolymerises DNA (D) Inhibits peptidyl transferase activity

Description : In prokaryotes, chloramphenicol (A) Causes premature release of the polypeptide chain (B) Causes misreading of the mRNA (C) Depolymerises DNA (D) Inhibits peptidyl transferase activity

Last Answer : Answer : A

Reduction of D-ribonucleotides to D-deoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimindazole cobamide (B) Thiredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate VITAMINS 131

Description : Reduction of D-ribonucleotides to D-deoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimindazole cobamide (B) Thiredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate VITAMINS 131

Last Answer : Answer : A

Reduction of D-ribonucleotides to Ddeoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimidazole cobamide (B) Thioredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate

Description : Reduction of D-ribonucleotides to Ddeoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimidazole cobamide (B) Thioredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate

Last Answer : Answer : B

Glucokinase (A) Is widely distributed and occurs in most mammalian tissues (B) Has a high km for glucose and hence is important in the phosphorylation of glucose primarily after ingestion of a carbohydrate rich meal (C) Is widely distributed in Prokaryotes (D) None of these

Description : Glucokinase (A) Is widely distributed and occurs in most mammalian tissues (B) Has a high km for glucose and hence is important in the phosphorylation of glucose primarily after ingestion of a carbohydrate rich meal (C) Is widely distributed in Prokaryotes (D) None of these

Last Answer : B

Are prokaryotes and eukaryotes similar in any respects?

Description : Are prokaryotes and eukaryotes similar in any respects?

Last Answer : Prokaryotes and eukaryotes share common features, among them the possession of nucleic acids and other organic substances such as proteins, carbohydrates, and lipids. In addition, they utilize similar ... although the mode of reproduction may be different and different organs of motility may exist.

Assetion: In recombinant DNA technology, human genes are often transferred into bacteria (prokaryotes) or yeast (eukaryote) Reason : Both bacteria and

Description : Assetion: In recombinant DNA technology, human genes are often transferred into bacteria (prokaryotes) or yeast (eukaryote) Reason : Both bacteria and

Last Answer : Assetion: In recombinant DNA technology, human genes are often transferred into bacteria (prokaryotes) or ... . If both assertion and reason are false

Mention any four features of the proto - industrial system. -SST 10th

Description : Mention any four features of the proto - industrial system. -SST 10th

Last Answer : (i) Impact on cottagers and peasants : After the disappearing of open field system cottagers and poor peasants who had earlier depended on common lands for their survival, gathering their firewood, ... goods were no: produced in factories by the cotta cottagers and Hie peasants and their families.

The proto-industrialisation helped in building a close relationship between the town and the countryside”. -SST 10th

Description : The proto-industrialisation helped in building a close relationship between the town and the countryside”. -SST 10th

Last Answer : (i) Merchants were based in towns but the work was done mostly in the countryside by the peasant households. (ii) A merchant clothier in England purchased wool from a wool stapler, and ... ) The finishing was done in London before the export merchant sold the cloth in the international market.

What is proto-industrialisation ? -SST 10th

Description : What is proto-industrialisation ? -SST 10th

Last Answer : Proto-industrialisation is the phase of industrialisation that was not based on the factory system. Before the coming of factories, there was large-scale industrial production for an international market. This part of industrial history is known as proto-industrialisation.

How was proto-industrialisation different from factory production ? -SST 10th

Description : How was proto-industrialisation different from factory production ? -SST 10th

Last Answer : Proto-industrialisation was a decentralised method of production which was controlled by merchants and the goods were produced by a vast number of producers located in different places whereas under ... became centralised. Most of the processes were brought together under one roof and management.

What is meant by proto-industrialisation ? How did it affect the rural peasants and artisans ? -SST 10th

Description : What is meant by proto-industrialisation ? How did it affect the rural peasants and artisans ? -SST 10th

Last Answer : It was the phase of industrialisation before the Industrial Revolution, where there was large- scale industrial production for an international market which was not factory based. Impact: (i) Full ... income from cultivation. It also allowed them a fuller use of their family labour resources.

What were the benefits enjoyed by the villagers in the proto- industrial system. -SST 10th

Description : What were the benefits enjoyed by the villagers in the proto- industrial system. -SST 10th

Last Answer : As common agricultural land was disappearing, the villagers and poor peasants, who had earlier depended on common lands for their survival, had to look for alternative sources of income. The ... their family labour resources, as all the members of the family could work for these merchants.

In what ways the proto-industrial production helped the poor farmers in countryside? -SST 10th

Description : In what ways the proto-industrial production helped the poor farmers in countryside? -SST 10th

Last Answer : Following are the ways from which the proto-industrial production helped the poor farmers in countryside: 1.In the countryside poor peasants and artisans began looking for merchants ... proto-industrialisation supplemented their shrinking income from cultivation and raised their standard of living.

How was cloth manufactured in England during the proto-industrial period? -SST 10th

Description : How was cloth manufactured in England during the proto-industrial period? -SST 10th

Last Answer : . Merchants were based in towns but the work was done mostly in the countryside. . A merchant clothier in England purchased wool from a wool stapler. . From there, it was carried to the ... The finishing was done in London before the export merchant sold the cloth in the international market.

Explain what is meant by proto-industrialization. -SST 10th

Description : Explain what is meant by proto-industrialization. -SST 10th

Last Answer : Even before factories began to be set up in England and Europe, there was large-scale industrial production for an international market. This period was referred to as proto - industrialization ... historians because this is the phase of industrialization that was not based on the factory system.

What is meant by proto-industrialisation ? -SST 10th

Description : What is meant by proto-industrialisation ? -SST 10th

Last Answer : Proto-industrialisation refers to first or early form of industrialisation. Even before the factories came up in England and Europe, there was large-scale industrial production for an international ... , regulated competition and prices and restricted the entry of new people into the trade.

Describe the nexus of merchants and cotton textile producers in proto-industry. -SST 10th

Description : Describe the nexus of merchants and cotton textile producers in proto-industry. -SST 10th

Last Answer : In the proto-industrial stage, cotton was produced in the following ways: (i) Merchant clothier bought wool from stapler, the person who sorted wool according to its fibres. (ii) ... town and countryside developed in which a network of commercial exchange existed between merchants and farmers.

Explain the main features of proto-industrialisation. -SST 10th

Description : Explain the main features of proto-industrialisation. -SST 10th

Last Answer : Proto-industrialisation refers to a phase of industrialisation which was not based on factories. Even before factories began to appear, there was large-scale industrial production for international ... workers were employed by each merchant, with each clothier thus controlling hundreds of workers.

What is meant by proto-industrialization? -SST 10th

Description : What is meant by proto-industrialization? -SST 10th

Last Answer : Proto-industrialization was the early phase of industrialization in Europe and England when there was large scale industrial production for an international market. This was not based on factories. It was ... commons due to enclosure movement. (ii) They now looked for alternative source of income.

What was ‘proto-industrialization’? -SST 10th

Description : What was ‘proto-industrialization’? -SST 10th

Last Answer : Proto-industrialization refers to the system of industries that existed in Europe before the arrival of modern machine run factories. Large scale industrial production took place for an international ... (iv) They got a source of income which supplemented their shrinking income from cultivation.