A normal cell can be transformed into a cancer cell by all of the following except (A) Ionising radiation (B) Mutagenic chemicals (C) Oncogenic bacteria (D) Some viruses

A normal cell can be transformed into a cancer cell by all of the following except (A) Ionising radiation (B) Mutagenic chemicals (C) Oncogenic bacteria (D) Some viruses
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Which of the following oncogenic viruses was first detected? A.Rous sarcoma virus. B.Epstein-Barr virus C.Herpes simplex virus type 2 D.Human T cell leukaemia virus

Description : Which of the following oncogenic viruses was first detected? A.Rous sarcoma virus. B.Epstein-Barr virus C.Herpes simplex virus type 2 D.Human T cell leukaemia virus

Last Answer : A.Rous sarcoma virus.

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

What are oncogenic viruses? -Biology

Description : What are oncogenic viruses? -Biology

Last Answer : Oncogenic viruses. Cancer, cause uncontrolled cell growth. immortalization or transformation of cells.

Which of the following are oncogenic viruses? a. polio b. HIV c. HPV d. rabies

Description : Which of the following are oncogenic viruses? a. polio b. HIV c. HPV d. rabies

Last Answer : c. HPV

Mutations can be caused by (A) Ultraviolet radiation (B) Ionising radiation (C) Alkylating agents (D) All of these

Description : Mutations can be caused by (A) Ultraviolet radiation (B) Ionising radiation (C) Alkylating agents (D) All of these

Last Answer : Answer : C

Exposure of the patient to ionising radiation when taking a radiograph is NOT REDUCED by: A. The use of fast film B. The addition of filtration C. Collimation of the beam D. The use of an open and lead lined cone E. Decreasing the kilovoltage KvP

Description : Exposure of the patient to ionising radiation when taking a radiograph is NOT REDUCED by: A. The use of fast film B. The addition of filtration C. Collimation of the beam D. The use of an open and lead lined cone E. Decreasing the kilovoltage KvP

Last Answer : E. Decreasing the kilovoltage KvP

Give advantages, disadvantages and applications of sterilization by ionising radiation.

Description : Give advantages, disadvantages and applications of sterilization by ionising radiation.

Last Answer : Advantages: The method is reliable and can be accurately controlled No degradation of media during sterilization, thus it can be used for thermally labile media Gamma rays have ... Bones and tissue transplant, plastic tubing, catheters and sutures. Sterilization of thermolabile medicaments. 

Which of the following type of recombination does not require homologous sequences and isimportant for the integration of viral genomes into bacterial chromosomes? A- Mutagenic recombimation B- Site-specific recombination C- Replicative recombination D- General recombination

Description : Which of the following type of recombination does not require homologous sequences and isimportant for the integration of viral genomes into bacterial chromosomes? A- Mutagenic recombimation B- Site-specific recombination C- Replicative recombination D- General recombination

Last Answer : Site-specific recombination

The type of recombination that commonly occurs between a pair of homologous DNA sequences is, A- mutagenic recombination B- site-specific recombination C- replicative recombination D- general recombination

Description : The type of recombination that commonly occurs between a pair of homologous DNA sequences is, A- mutagenic recombination B- site-specific recombination C- replicative recombination D- general recombination

Last Answer : general recombination

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

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.

Are chromosomes the only parts of bacteria that can be transformed?

Description : Are chromosomes the only parts of bacteria that can be transformed?

Last Answer : Bacteria possess extrachromosomal loops of DNA called plasmids. Plasmids are small, self-replicating loops of DNA with about 10 to 50 genes. They are not essential for the survival of the ... process called curing, which can occur spontaneously or can be induced by certain environmental factors. 

Are chromosomes the only parts of bacteria that can be transformed?

Description : Are chromosomes the only parts of bacteria that can be transformed?

Last Answer : Bacteria possess extrachromosomal loops of DNA called plasmids. Plasmids are small, self-replicating loops of DNA with about 10 to 50 genes. They are not essential for the survival of the ... process called curing, which can occur spontaneously or can be induced by certain environmental factors. 

Restriction endonucleases are present in (A) Viruses (B) Bacteria (C) Eukaryotes (D) All of these

Description : Restriction endonucleases are present in (A) Viruses (B) Bacteria (C) Eukaryotes (D) All of these

Last Answer : Answer : B

Non-coding sequence are present in the genes of (A) Bacteria (B) Viruses (C) Eukaryotes (D) All of these

Description : Non-coding sequence are present in the genes of (A) Bacteria (B) Viruses (C) Eukaryotes (D) All of these

Last Answer : Answer : C

Introns are present in DNA of (A) Viruses (B) Bacteria (C) Man (D) All of these

Description : Introns are present in DNA of (A) Viruses (B) Bacteria (C) Man (D) All of these

Last Answer : Answer : C

Mitochondrial DNA is present in (A) Bacteria (B) Viruses (C) Eukaryotes (D) All of these

Description : Mitochondrial DNA is present in (A) Bacteria (B) Viruses (C) Eukaryotes (D) All of these

Last Answer : Answer : C

Passive immunity can be produced by administration of (A) Pure antigens (B) Immunoglobulins (C) Toxoids (D) Killed bacteria or viruses

Description : Passive immunity can be produced by administration of (A) Pure antigens (B) Immunoglobulins (C) Toxoids (D) Killed bacteria or viruses

Last Answer : Answer : B

Active immunity can be produced by administration of (A) Killed bacteria or viruses (B) Live attenuated bacteria or viruses (C) Toxoids (D) All of these

Description : Active immunity can be produced by administration of (A) Killed bacteria or viruses (B) Live attenuated bacteria or viruses (C) Toxoids (D) All of these

Last Answer : Answer : D

Which is most ionising

Description : Which is most ionising

Last Answer : Which is most ionising A. X-rays B. `gamma`-rays C. `beta-`rays D. `alpha`-rays

Non-ionising radiations damaging to DNA are

Description : Non-ionising radiations damaging to DNA are

Last Answer : Non-ionising radiations damaging to DNA are A. X-rays B. U.V. rays C. Gamma rays D. Beta rays

(A) `alpha`-rays have greater ionising power the `beta` (R ) `alpha`-particles carry `2^(+)` charge while `beta`-particles carry only `I^(-)` charge.

Description : (A) `alpha`-rays have greater ionising power the `beta` (R ) `alpha`-particles carry `2^(+)` charge while `beta`-particles carry only `I^(-)` charge.

Last Answer : (A) `alpha`-rays have greater ionising power the `beta` (R ) `alpha`-particles carry `2^(+)` charge while ... . D. If both (A) and (R ) are incorrect.

The correct order of ionising capcity of `alpha, beta` and `gamma`-rays is

Description : The correct order of ionising capcity of `alpha, beta` and `gamma`-rays is

Last Answer : The correct order of ionising capcity of `alpha, beta` and `gamma`-rays is A. `alpha gt beta gt gamma` ... alpha gt beta` D. `beta gt gamma gt alpha`

Pick out the correct statement. (A) Positron is the antiparticle of electron (B) In α-decay, the ratio of neutron to proton decreases (C) Ionising power of β-rays is higher than that of α-rays (D) Speed of α-rays is more than that of γ-ray

Description : Pick out the correct statement. (A) Positron is the antiparticle of electron (B) In α-decay, the ratio of neutron to proton decreases (C) Ionising power of β-rays is higher than that of α-rays (D) Speed of α-rays is more than that of γ-ray

Last Answer : (A) Positron is the antiparticle of electron

Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes

Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes

Last Answer : Answer : C

Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes

Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes

Last Answer : Answer : C

All of the following statements about RNA-dependent DNA polymerase are true except: (A) It synthesizes DNA using RNA as a template (B) It is also known as reverse transcriptase (C) It synthesizes DNA in 5’→3’ direction (D) It is present in all the viruses

Description : All of the following statements about RNA-dependent DNA polymerase are true except: (A) It synthesizes DNA using RNA as a template (B) It is also known as reverse transcriptase (C) It synthesizes DNA in 5’→3’ direction (D) It is present in all the viruses

Last Answer : Answer : D

If DNA of a cancer cell is introduced into a normal cell, the recipient cell (A) Destroys the DNA (B) Loses its ability to divide (C) Dies (D) Changes into a cancer cell

Description : If DNA of a cancer cell is introduced into a normal cell, the recipient cell (A) Destroys the DNA (B) Loses its ability to divide (C) Dies (D) Changes into a cancer cell

Last Answer : Answer : D

After completing pulp extirpation, debridement and placing a dressing; apical periodontitis is because: A. Over instrumentation extending into periapical area B. Irritation from chemicals used C. Entrapped bacteria D. One or any combination of the above

Description : After completing pulp extirpation, debridement and placing a dressing; apical periodontitis is because: A. Over instrumentation extending into periapical area B. Irritation from chemicals used C. Entrapped bacteria D. One or any combination of the above

Last Answer : D. One or any combination of the above

The concept of chemical evolution is based on (a) interaction of water, air and clay under intense heat (b) effect of solar radiation on chemicals (c) possible origin of life by combination of chemicals under suitable environmental conditions (d) crystallisation of chemicals.

Description : The concept of chemical evolution is based on (a) interaction of water, air and clay under intense heat (b) effect of solar radiation on chemicals (c) possible origin of life by combination of chemicals under suitable environmental conditions (d) crystallisation of chemicals.

Last Answer : (c) possible origin of life by combination of chemicals under suitable environmental conditions

What's the significance of stores posting signs warning the public of the risk of cancer-causing products and chemicals in their vicinity?

Description : What's the significance of stores posting signs warning the public of the risk of cancer-causing products and chemicals in their vicinity?

Last Answer : answer:I believe it has to do with Proposition 65, SAFE DRINKING WATER AND TOXIC ENFORCEMENT ACT OF 1986 You often see labeling that is required by the act on products that reads something like: WARNING: This ... does California know that my state doesn't know? What's my state not telling us? :-)

Exposure to chemicals having carcinogenic properties cause (A) Dermatitis (skin disorder) (B) Cancer (C) Asphyxiation (suffocation) (D) Asthma

Description : Exposure to chemicals having carcinogenic properties cause (A) Dermatitis (skin disorder) (B) Cancer (C) Asphyxiation (suffocation) (D) Asthma

Last Answer : (B) Cancer

Exposure to chemicals having carcinogenic properties cause (A) Dermatitis (skin disorder) (B) Cancer (C) Asphyxiation (D) Asthma

Description : Exposure to chemicals having carcinogenic properties cause (A) Dermatitis (skin disorder) (B) Cancer (C) Asphyxiation (D) Asthma

Last Answer : (B) Cancer

Chemoautotrophic bacteria obtain the energy they need from a. The Reactions Of Photosynthesis. b. Sunlight. c. Carbon Dioxide In The Atmosphere. d. Inorganic Chemicals.

Description : Chemoautotrophic bacteria obtain the energy they need from a. The Reactions Of Photosynthesis. b. Sunlight. c. Carbon Dioxide In The Atmosphere. d. Inorganic Chemicals.

Last Answer : b. Sunlight.

Biodegradable wastes can usually be converted into useful substances with the help of - (1) Bacteria (2) Nuclear proteins (3) Radioactive substances (4) Viruses

Description : Biodegradable wastes can usually be converted into useful substances with the help of - (1) Bacteria (2) Nuclear proteins (3) Radioactive substances (4) Viruses

Last Answer : (1) Bacteria Explanation: Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms such as ... or a resource for heat, electricity and fuel by means of incineration or anaerobic digestion.

Biodegradable wastes can usually be converted into useful substances with the help of - (1) bacteria (2) nuclear proteins (3) radioactive substances (4) viruses

Description : Biodegradable wastes can usually be converted into useful substances with the help of - (1) bacteria (2) nuclear proteins (3) radioactive substances (4) viruses

Last Answer : (1) bacteria Explanation: Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.

Biogradable wastes can usually be converted into useful substances with the help of: (1) nuclear proteins (2) radio-active substances (3) viruses (4) bacteria

Description : Biogradable wastes can usually be converted into useful substances with the help of: (1) nuclear proteins (2) radio-active substances (3) viruses (4) bacteria

Last Answer : (4) bacteria Explanation: Bacteria can convert biodegradable wastes into useful substances.

Biodegradable wastes can usually be converted into useful substances with the help of - (1) Bacteria (2) Nuclear proteins (3) Radioactive substances (4) Viruses

Description : Biodegradable wastes can usually be converted into useful substances with the help of - (1) Bacteria (2) Nuclear proteins (3) Radioactive substances (4) Viruses

Last Answer : (1) Bacteria Explanation: Bacteria are the most abundant organisms which play important role in the decomposition of organic matter. Majority of bacteria involved in decomposition of organic ... and autotrophs are least in proportion which are not directly involved in organic matter decomposition.

Biodegradable wastes can usually be converted into useful substances with the help of (1) Bacteria (2) Nuclear proteins (3) Radioactive substances (4) Viruses

Description : Biodegradable wastes can usually be converted into useful substances with the help of (1) Bacteria (2) Nuclear proteins (3) Radioactive substances (4) Viruses

Last Answer : Bacteria

Carbohydrates, the most abundant biomolecule on earth, are produced by (a) some bacteria, algae and green plant cells (b) fungi, algae and green plant cells (c) all bacteria, fungi and algae (d) viruses, fungi and bacteria.

Description : Carbohydrates, the most abundant biomolecule on earth, are produced by (a) some bacteria, algae and green plant cells (b) fungi, algae and green plant cells (c) all bacteria, fungi and algae (d) viruses, fungi and bacteria.

Last Answer : (a) some bacteria, algae and green plant cells

[Science and the world of tomorrow] A pill, synthesized protein, elixir, etc. is developed that will make a person more alert, resistant to viruses and most forms of cancer and do so within eight to twenty-one months after first use, but it has certain side effects, would you try it?

Description : [Science and the world of tomorrow] A pill, synthesized protein, elixir, etc. is developed that will make a person more alert, resistant to viruses and most forms of cancer and do so within eight to twenty-one months after first use, but it has certain side effects, would you try it?

Last Answer : I would consider taking it when I’m older and more likely to get cancer, but probably not now.

How big must a pile of bacteria or viruses be to be visible to the human eye?

Description : How big must a pile of bacteria or viruses be to be visible to the human eye?

Last Answer : A pinhead.

Would finding out that obesity is caused by bacteria or viruses change your perspective on it?

Description : Would finding out that obesity is caused by bacteria or viruses change your perspective on it?

Last Answer : The simple fact of the matter is that only so much can be blamed on something other than the mechanics of fork-to-mouth. You don’t become 300 lbs overweight by catching a bug.

How do viruses differ from bacteria? -Biology

Description : How do viruses differ from bacteria? -Biology

Last Answer : On a biological level, the main difference is that bacteria are free-living cells that can live inside or outside a body, while viruses are a non-living collection of molecules that need a host to survive.

How are viruses different from bacteria?

Description : How are viruses different from bacteria?

Last Answer : Bacteria:Single-celledCan exist outside of a hostVirus:Not a cellCannot exist outside of a host for long

How are viruses different from bacteria Apex?

Description : How are viruses different from bacteria Apex?

Last Answer : Viruses cannot survive outside a host. -apex

Are bacteria viruses and rickettsia pathogens?

Description : Are bacteria viruses and rickettsia pathogens?

Last Answer : They all can be, but not all bacteria ec cause disease and someare symbiotes.

Is filter removes bacteria and viruses?

Description : Is filter removes bacteria and viruses?

Last Answer : Need answer

What is theInfection of the lungs caused by viruses bacteria or fungi?

Description : What is theInfection of the lungs caused by viruses bacteria or fungi?

Last Answer : Need answer

Are vaccines for viruses or bacteria?

Description : Are vaccines for viruses or bacteria?

Last Answer : nope it depends when its vaccine for viruses the price is so high when its for vitamins the price is normal you can be healthy without vaccine just eat nutritious foods