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

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

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

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

All the following statements about retino blastoma are true except (A) At least two mutations are required for its development (B) One mutation can be inherited from a parent (C) Children who have inherited one mutation develop retinoblastoma at a younger age (D) RB 1 gene promotes the development of retinoblastoma

Description : All the following statements about retino blastoma are true except (A) At least two mutations are required for its development (B) One mutation can be inherited from a parent (C) Children ... mutation develop retinoblastoma at a younger age (D) RB 1 gene promotes the development of retinoblastoma

Last Answer : Answer : D

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

Binding of growth hormone to its receptor results in increased transcription of (A) c-fos gene (B) c-myc gene (C) p-53 gene (D) None of these

Description : Binding of growth hormone to its receptor results in increased transcription of (A) c-fos gene (B) c-myc gene (C) p-53 gene (D) None of these

Last Answer : Answer : A

Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes. b) Huntingon Disease Huntington disease is one example of a germ-line mutation. c) Duchenne Muscular Dystrophy Duchenne muscular dystrophy, an inherited form of muscular dystrophy, is an example of a genetic caused by structural gene mutations. d) Marphan Syndrome Marphan Syndrome is a genetic condition that may occur in a single family member as a result of spontaneous mutation.

Description : Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two ... genetic condition that may occur in a single family member as a result of spontaneous mutation.

Last Answer : a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes.

If a gene mutation prevents formation of an enzyme normally used by a lysosomes, a disease may result known as (A) Lysosomal abstracted disease (B) Lysosomal secretory disease (C) Lysosomal storage disease (D) All A, B and C

Description : If a gene mutation prevents formation of an enzyme normally used by a lysosomes, a disease may result known as (A) Lysosomal abstracted disease (B) Lysosomal secretory disease (C) Lysosomal storage disease (D) All A, B and C

Last Answer : (C) Lysosomal storage disease

John Locke's phrase of tabula rasa means Options: A) Tal and Ras B) free education C) mind itself is a result of the process of evolution D) All of the above

Description : John Locke's phrase of tabula rasa means Options: A) Tal and Ras B) free education C) mind itself is a result of the process of evolution D) All of the above

Last Answer : C) mind itself is a result of the process of evolution 

Cancer cells may become resistant to amethopterin by (A) Developing mechanisms to destroy amethopterin (B) Amplification of dihydrofolate reducatse gene (C) Mutation in the dihydrofolate reductase gene so that the enzyme is no longer inhibited by amethopterin (D) Developing alternate pathway of thymidylate synthesis

Description : Cancer cells may become resistant to amethopterin by (A) Developing mechanisms to destroy amethopterin (B) Amplification of dihydrofolate reducatse gene (C) Mutation in the dihydrofolate reductase ... is no longer inhibited by amethopterin (D) Developing alternate pathway of thymidylate synthesis

Last Answer : Answer : B

Marfan’s syndrome results from a mutation in the gene coding: (A) Collagen (B) Elastin (C) Fibrillin (D) Keratin

Description : Marfan’s syndrome results from a mutation in the gene coding: (A) Collagen (B) Elastin (C) Fibrillin (D) Keratin

Last Answer : Answer : B

Retinoblastoma is the most common eye tumor of childhood; it is hereditary in a) 30-40% of cases. Retinoblastoma can be hereditary or nonhereditary. It is hereditary in 30-40% of cases. All bilateral cases are hereditary.

Description : Retinoblastoma is the most common eye tumor of childhood; it is hereditary in a) 30-40% of cases. Retinoblastoma can be hereditary or nonhereditary. It is hereditary in 30-40% of cases. All bilateral cases are ... 30-40% of cases. d) 50-75% of cases. Retinoblastoma is hereditary in 30-40% of cases.

Last Answer : a) 30-40% of cases. Retinoblastoma can be hereditary or nonhereditary. It is hereditary in 30-40% of cases. All bilateral cases are hereditary.

The most common primary intraocular malignancy in adults is: a. Retinoblastoma b. Choroidal melanoma c. Squamous cell carcinoma of conjunctiva d. Iris nevus

Description : The most common primary intraocular malignancy in adults is: a. Retinoblastoma b. Choroidal melanoma c. Squamous cell carcinoma of conjunctiva d. Iris nevus 

Last Answer : ANSWER: B  

Amaurotic cat's eye reflex is seen in: a. Papilloedema b. Retinoblastoma c. Papillitis d. Retinitis

Description : Amaurotic cat's eye reflex is seen in: a. Papilloedema b. Retinoblastoma c. Papillitis d. Retinitis 

Last Answer : ANSWER: B 

If the codon UAC on mRNA changes into UAG as a result of a base substitution in DNA, it will result in (A) Silent mutation (B) Acceptable mis-sense mutation (C) Nonsense mutation (D) Frameshift mutation

Description : If the codon UAC on mRNA changes into UAG as a result of a base substitution in DNA, it will result in (A) Silent mutation (B) Acceptable mis-sense mutation (C) Nonsense mutation (D) Frameshift mutation

Last Answer : Answer : C

A silent mutation is most likely to result from (A) Substitution of the first base of a codon (B) Substitution of the third base of a codon (C) Conversion of a nonsense codon into a sense codon (D) Conversion of a sense codon into a nonsense codon

Description : A silent mutation is most likely to result from (A) Substitution of the first base of a codon (B) Substitution of the third base of a codon (C) Conversion of a nonsense codon into a sense codon (D) Conversion of a sense codon into a nonsense codon

Last Answer : Answer : B

Substitution of a base can result in a (A) Silent mutation (B) Mis-sense mutation (C) Nonsense mutation(D) All of these

Description : Substitution of a base can result in a (A) Silent mutation (B) Mis-sense mutation (C) Nonsense mutation(D) All of these

Last Answer : Answer : D

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

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

Last Answer : Answer : C

What is gene mutation? -Biology

Description : What is gene mutation? -Biology

Last Answer : answer:

A point mutation occurs in a sex cell of an adult chimpanzee. The mutation is located on a gene responsible for the development of the eye. Which describes the most likely effect of this mutation?

Description : A point mutation occurs in a sex cell of an adult chimpanzee. The mutation is located on a gene responsible for the development of the eye. Which describes the most likely effect of this mutation?

Last Answer : The chimpanzee's offspring will have abnormal eyes.

How does a mutation in a gene affect the order of DNA based?

Description : How does a mutation in a gene affect the order of DNA based?

Last Answer : A mutation in a gene can happen by addition, deletion orsubstitution of base pairs. This means that the order of the baseswill change- a new base may be added, a base may be lost, or onebase ... occurs in a sex cell, themutation can be passed on to an offspring and affect theoffspring's phenotype.

How is it possible for a point mutation to have no effect on the function of the gene TAC CG?

Description : How is it possible for a point mutation to have no effect on the function of the gene TAC CG?

Last Answer : Feel Free to Answer

When one gene pair hides the effect of the other unit, the phenomenon is referred to as: (1) Epistasis (2) Mutation (3) None of the options (4) Dominance

Description : When one gene pair hides the effect of the other unit, the phenomenon is referred to as: (1) Epistasis (2) Mutation (3) None of the options (4) Dominance

Last Answer : (1) Epistasis Explanation: Epistasis refers to the phenomenon in which one gene hides the effect of the other. In other word, it does not allow the other gene to express itself. This is counterpart of ... may be in one direction only meaning that ei-ther A hides the effect of B or vice versa.

Gamma rays can cause – (1) gene mutation (2) sneezing (3) burning (4) fever

Description : Gamma rays can cause – (1) gene mutation (2) sneezing (3) burning (4) fever

Last Answer : (1) gene mutation Explanation: In molecular biology and genetics, mutations are accidental changes in a genomic sequence of DNA: the DNA sequence of a cell's genome or the DNA or RNA ... viruses, transposons and mutagenic chemicals, as well as errors that, occur during meiosis or DNA replication.

Which enzyme will be produced in a cell if there is a nonsense mutation in the lac Y gene? (a) Transacetylase (b) Lactose permease and transacetylase (c) β-galactosidase (d) Lactose permease

Description : Which enzyme will be produced in a cell if there is a nonsense mutation in the lac Y gene? (a) Transacetylase (b) Lactose permease and transacetylase (c) β-galactosidase (d) Lactose permease

Last Answer : β-galactosidase

A gene pair hides the effect of another gene. The phenomenon is called (a) dominance (b) segregation (c) epistasis (d) mutation

Description : A gene pair hides the effect of another gene. The phenomenon is called (a) dominance (b) segregation (c) epistasis (d) mutation

Last Answer : (c) epistasis

A heritable change in DNA is called a ______. a. mistake b. mutation c. gene d. pathogen

Description : A heritable change in DNA is called a ______. a. mistake b. mutation c. gene d. pathogen

Last Answer : b. mutation

A specific BRCA1 cancer-predisposing gene mutation seems to occur more frequently among women of which descent? a) Ashkanazi Jewish Expression of the BRCA1 gene is an example of inheritance in the development of breast cancer. b) Mediterranean Glucose-6-phosphate dehydrogenase deficiency (G6PD) is a common enzyme abnormality that affects millions of people throughout the world, especially those of Mediterranean, South East Asian, African, Middle Eastern, and Near Eastern origin.

Description : A specific BRCA1 cancer-predisposing gene mutation seems to occur more frequently among women of which descent? a) Ashkanazi Jewish Expression of the BRCA1 gene is an example of ... of treatment for tuberculosis) are at significantly increased risk for developing isoniazid-induced hepatitis.

Last Answer : a) Ashkanazi Jewish Expression of the BRCA1 gene is an example of inheritance in the development of breast cancer.

Which type of Mendelian inherited condition results in both genders being affected equally in a vertical pattern? a) Automosomal dominant inheritance An individual who has an autosomal dominant inherited condition carries a gene mutation for that condition on one chromosome of a pair. b) Automosomal recessive inheritance The pattern of inheritance in autosomal recessive inherited conditions is different from that of autosomal dominant inherited conditions in that it is more horizontal than vertical, with relatives of a single generation tending to have the condition. c) X-linked inheritance X-linked conditions may be inherited in families in recessive or dominant patterns.

Description : Which type of Mendelian inherited condition results in both genders being affected equally in a vertical pattern? a) Automosomal dominant inheritance An individual who has an autosomal dominant ... that combine during early embryonic development leading to incomplete closure of the neural tube.

Last Answer : a) Automosomal dominant inheritance An individual who has an autosomal dominant inherited condition carries a gene mutation for that condition on one chromosome of a pair.

27. A ‘single step-large mutation’ is known as ... b) Branching descent b) Natural Selection c) Saltation d) Gene Migration

Description : 27. A ‘single step-large mutation’ is known as ... b) Branching descent b) Natural Selection c) Saltation d) Gene Migration

Last Answer : c) Saltation

7. A ‘single step-large mutation’ is known as ... a) Branching descent b) Natural Selection c) Saltation d) Gene Migration

Description : 7. A ‘single step-large mutation’ is known as ... a) Branching descent b) Natural Selection c) Saltation d) Gene Migration

Last Answer : c) Saltation

_______________ acts to inhibit reproductive isolation. A) Mutation B) Natural selection C) Genetic drift D) Gene flow

Description : _______________ acts to inhibit reproductive isolation. A) Mutation B) Natural selection C) Genetic drift D) Gene flow

Last Answer : D) Gene flow

The origin of a new species first requires A) reduced gene flow. B) increased gene flow. C) reduced mutation rates. D) increased mutation rates.

Description : The origin of a new species first requires A) reduced gene flow. B) increased gene flow. C) reduced mutation rates. D) increased mutation rates.

Last Answer : A) reduced gene flow.

The type of gene interaction in which the effects of one gene override or mask the effects of other entirely different genes is called: a) linkage b) mutation c) pleitropy (pron: ply-ah-tropy) d) epistasis (pron: eh-pis-te-sis)

Description : The type of gene interaction in which the effects of one gene override or mask the effects of other entirely different genes is called: a) linkage b) mutation c) pleitropy (pron: ply-ah-tropy) d) epistasis (pron: eh-pis-te-sis)

Last Answer : ANSWER: D -- EPISTASIS

When one gene pair hides the effect of the other unit, the phenomenon is referred to as: (1) Epistasis (2) Mutation (3) None of the options (4) Dominance

Description : When one gene pair hides the effect of the other unit, the phenomenon is referred to as: (1) Epistasis (2) Mutation (3) None of the options (4) Dominance

Last Answer : Epistasis

Gamma rays can cause (1) gene mutation (2) sneezing (3) burning (4) fever

Description : Gamma rays can cause (1) gene mutation (2) sneezing (3) burning (4) fever

Last Answer : gene mutation

Why do oncogene acts as though it is stuck in the on position?

Description : Why do oncogene acts as though it is stuck in the on position?

Last Answer : Feel Free to Answer

Which of the following belong to the family of C-X-C chemokines? a. IL-8 b. IL-10 c. Growth Related Oncogene-a d. Leukotreine B4 e. b Thromboglobulin

Description : Which of the following belong to the family of C-X-C chemokines? a. IL-8 b. IL-10 c. Growth Related Oncogene-a d. Leukotreine B4 e. b Thromboglobulin

Last Answer : Answer: a, c, e A particularly important group of novel chemotactic cytokines has been elucidated over the last decade. Twelve are known and are listed below. C-X-C ... in vivo cytokine networks involving these molecules which regulate chemotaxis, and other fundamental aspects of inflammation

Rivers' postulates can be used toa. locate an oncogene in a cell that is cancerous. b. develop inactivated viruses for use in a vaccine. c. eliminate viruses with certain chemical agents. d. relate a particular virus to a particular disease.

Description : Rivers' postulates can be used to a. locate an oncogene in a cell that is cancerous. b. develop inactivated viruses for use in a vaccine. c. eliminate viruses with certain chemical agents. d. relate a particular virus to a particular disease.

Last Answer : d. relate a particular virus to a particular disease.

The oncogene theory states that transforming genes a. Normally Occur In The Host Genome. b. Can Exist In Viruses. c. Are Not Of Viral Origin. d. All Of The Above (A—C) Are Correct.

Description : The oncogene theory states that transforming genes a. Normally Occur In The Host Genome. b. Can Exist In Viruses. c. Are Not Of Viral Origin. d. All Of The Above (A—C) Are Correct.

Last Answer : d. All Of The Above (A—C) Are Correct

For which disease is Oncogene responsible?

Description : For which disease is Oncogene responsible?

Last Answer : Cancer

In "Batman begins", Ra's Al Ghul explains Bruce Wayne parents' death is his father's fault, not Bruce's. Why?

Description : In "Batman begins", Ra's Al Ghul explains Bruce Wayne parents' death is his father's fault, not Bruce's. Why?

Last Answer : Because Bruce was just a kid.

What is the full form of RAS ?

Description : What is the full form of RAS ?

Last Answer : The full form of RAS is Royal Asiatic Society

What is Pran Ras ?

Last Answer : Hormones are called vital juices

The odd product out of the following is [RAS 2010] (a) Sesame (b) Groundnut (c) Caster seed (d) Mustard

Description : The odd product out of the following is [RAS 2010] (a) Sesame (b) Groundnut (c) Caster seed (d) Mustard

Last Answer : Ans: (c)

Which of the following statements on DRAM are correct? i) Page mode read operation is faster than RAS read. ii) RAS input remains active during column address strobe. iii) The row and column addresses are strobed into the internal buffers using RAS and CAS inputs respectively. a) i & iii b) i & ii c) all d) iii

Description : Which of the following statements on DRAM are correct? i) Page mode read operation is faster than RAS read. ii) RAS input remains active during column address strobe. iii) The row and column addresses are strobed into the ... RAS and CAS inputs respectively. a) i & iii b) i & ii c) all d) iii

Last Answer : d) iii

With reference to Traffic Collision Avoidance Systems: a. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary and has the clearance confirmed by ATC b. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary and has advised ATC of the other aircraft’s proximity c. RAs must never be disregarded d. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary

Description : With reference to Traffic Collision Avoidance Systems: a. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation ... pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary

Last Answer : d. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary

Ras Malai Recipe

Description : Ras Malai Recipe

Last Answer : Ingredients: Dry Milk 2 cup Fresh Milk 1 kg Khoya 250 grams Eggs 2 Sugar 1 cup Cardamom Powder 1 tsp Baking Powder 1 tsp All Purpose Flour 2 tbsp Oil 2 tbsp Screw ... heat. Now take it out in a serving bowl garnish ½ cup of finely chopped almonds and pistachios and serve it.

On the Phanerozoic (pron: fan-eh-row-zo-ick) Time Scale, which of the following geologic periods occurred approximately 395 to 430 million years ago? Is it: w) Jurassic (pron: ju-ras-ick) x) Permian y) Carboniferous z) Silurian

Description : On the Phanerozoic (pron: fan-eh-row-zo-ick) Time Scale, which of the following geologic periods occurred approximately 395 to 430 million years ago? Is it: w) Jurassic (pron: ju-ras-ick) x) Permian y) Carboniferous z) Silurian

Last Answer : ANSWER: Z -- SILURIAN

Increasing skin cancer and high mutation rate are the result of

Description : Increasing skin cancer and high mutation rate are the result of

Last Answer : Increasing skin cancer and high mutation rate are the result of A. Acir rain B. Ozone depletion C. CO pollution D. `CO_(2)` pollution