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Which of the following muscular disorder is inherited?

 

  • Option 1)

    Tetany

  • Option 2)

    Muscular dystrophy

  • Option 3)

    Myasthenia gravis

  • Option 4)

    Botulism

 

G jk hbvffvbbvhvhdsa by yu bg ds.  By h juju fdg. M.l. n.  Df 754iivf. Bbm..

 

In a species,the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average reight between 3 to 3.3 kg survive whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die.Which type of selection process is taking place ?

  • Option 1)

    Directional Selection

  • Option 2)

    Stabilizing Selection

  • Option 3)

    Disruptive Solution

  • Option 4)

    Cyclical Solution

  Stabilizing or balancing selection - A type of natural detection which leads to the elimination of organism having over specialised characters and maintains homogeneous population which is generally constant.  - wherein It favours the average or normal phenotypes. Results in very low rate of evolution.        Stabilizing selection favours the medium types  while the extreme phenotypes  are...

Match the hominide with their correct brain size :

(a)\; Homohabilis\; \; \; \; \; \;\; \; (i)\; 900cc

(b)Homoneanderthalensis\; \; \; \; \; \; (ii)\; 1350cc

(c)Homo\; erectus\; \; \; \; \; \; (iii)\; 650-800cc

(d)Homo\; sapiens\; \; \; \; \; \; (iv)\;1400 cc

Select the correct option.

  • Option 1)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iii)\; \; \; \; (i)\; \; \; \; (iv)\; \; \; \; (ii)

     

     

     

  • Option 2)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iii)\; \; \; \; (ii)\; \; \; \; (i)\; \; \; \; (iv)

  • Option 3)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iii)\; \; \; \; (iv)\; \; \; \; (i)\; \; \; \; (ii)

  • Option 4)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iv)\; \; \; \; (iii)\; \; \; \; (i)\; \; \; \; (ii)

  Homo Habilis - Homo Habilis was a transitional man, species name was Habilis which means able or skilful. - wherein Fossils were discovered from Pleistocene rocks of Olduvai Gorge in East Africa.       (a)  had brain capacities between   (b)  had brain capacities of  (c)  had brain capacity of  (d) had brain capacity of Option 1)      Option 2) Option 3) Option 4)

Match the following genes of the Lac operon with their respective products :

(a)\; i \; gene \; \; \; \; \: \; (i)\; \beta -galactoridase

(b)\; z \; gene \; \; \; \; \: \; (ii)\; Permease

(c)\; a \; gene \; \; \; \; \: \; (iii)\; Repressor

(d)\; y \; gene \; \; \; \; \: \; (iv)\; Transacetylase

Select the correct option.

     

  • Option 1)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (i)\; \; \; \; (iii)\; \; \; \; (ii)\; \; \; \; (iv)

     

     

     

  • Option 2)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iii)\; \; \; \; (i)\; \; \; \; (ii)\; \; \; \; (iv)

  • Option 3)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iii)\; \; \; \; (i)\; \; \; \; (iv)\; \; \; \; (ii)

  • Option 4)

    (a)\; \; \; \; (b)\; \; \; \; (c)\; \; \; \; (d)

    (iii)\; \; \; \; (iv)\; \; \; \; (i)\; \; \; \; (ii)

  The lac operon - In lac operon, a polycistronic structural gene is regulated by a common promoter and regulatory genes.  - wherein Such arrangements are very common in bacteria and is referred to as operon.        (a)   codes for Repressor protein (b)   codes for -galactosidase (c)   codes for Transacetylase (d)   codes for PermeaseOption 1)      Option 2) Option 3) Option 4)

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology ?

 

  • Option 1)

    Genetic code is not ambiguous

  • Option 2)

    Genetic code is redundant

  • Option 3)

    Genetic code is nearly universal 

  • Option 4)

    Genetic code is specific

  Salient features of genetics code - The code is nearly universe eg; from bactria it human, UUU would code for phenylalanine. Some exception are found in mitochondrial codons, and in some protozoans. -     Genetic code is nearly universal. It means that the codons code for the same amino acid in all the organisms except for some minor deviations.This property of genetic code allows bacteria...

Select the incorrect statement:

 

  • Option 1)

    Male fruit fly is heterogametic.

  • Option 2)

    In male grasshopers,50% of sperms have no sex-chromosome.

  • Option 3)

    In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.

  • Option 4)

    Human males have one of their sex-chromosome much shorter than the other.

  Basis of Sex Determination - The cytological observations made in a number of insects lead to the development of the concept of genetic/chromosomal basis of sex. - wherein Experiments were performed by Henking (1891).     In fowls the sex is determined by the ovum and not sperm because in birds, the females are heterogametic (zw) and males are hemogametic (zz)Option 1)Male fruit fly is...

Variations caused by mutation, as proposed by Hugo de Vries, are:

  • Option 1)

    random and directional

  • Option 2)

    random and directionless

  • Option 3)

    small and directional

  • Option 4)

    small and directionless

  Hugo De Vries Mutation Theory - This theory states that new species arise from the pre-existing one in single generation situation by sudden  appearance of marked genetic variation called mutation - wherein According to De Vries, evolution in a discontinous and jerky process, rather than a continious and gradual one       According to Hugo De Vries, mutuations are discontinuous, random and...

A gene locus has two alleles A,a. If the frequency of dominant allele A is 0.4 ,then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ?

 

  • Option 1)

    0.36(AA);0.48(Aa);0.16(aa)

  • Option 2)

    0.16(AA);0.24(Aa);0.36(aa)

  • Option 3)

    0.16(AA);0.48(Aa);0.36(aa)

  • Option 4)

    0.16(AA);0.36(Aa);0.48(aa)

  The Hardy-Weinberg formulas - This formula allows detecting  frequencies that change from generation thus allowing a simplified method of determining that evolution is occurring. - wherein In a population at equilibrium for a locus of two alleles D and d having frequencies p and q respectively, the genotype frequencies are:  DD=p2, Dd= 2 pq, dd= q2  and p+q =1 p2+2 pq +q2 = 1     Given :   ...

Under which of the following conditions will there be no change in the reading frame of the following mRNA?

5' AACAGCGGUGCUAUU 3'

  • Option 1)

    Insertion of G at 5th position

  • Option 2)

    Deletion of G from 5th position

  • Option 3)

    Inseration of  A and G at 4th  and 5th position respectively

  • Option 4)

    Deletion of GGU from 7th ,8th  and 9th positions

Insertion or deletion of one or two bases changes the reading frame from the position of insertion or deletion. Hence, option 1,2 and 3 would cause change in reading frme. Deletion of three bases delets a codon and reading frame remains unaltered from that point onwards.  Option 1)Insertion of G at 5th positionOption 2)Deletion of G from 5th positionOption 3)Inseration of  A and G at 4th  and...

What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and sterile?

  • Option 1)

    Turner's Syndrome

  • Option 2)

    Klinefelter's syndrome

  • Option 3)

    Edward syndrome

  • Option 4)

    Down's syndrome

  Klinefelter's syndrome - It is caused due to the presence of an additional copy of x-chromosome resulting into a karyotype of 47,XXY. -     Klinfelter syndrome is caused by the presence of an extra X chromosomes in males, wherein the genetic composition is 44+XXY. The total no. of chromosmes is 47. The symptoms of this syndrome are sterility, development of breasts and masculine...

Expressed Sequence Tags (ESTs) refers to:

 

  • Option 1)

    Genes expressed as RNA

  • Option 2)

    Polypeptide expression

  • Option 3)

    DNA polymorphism 

  • Option 4)

    Novel DNA sequence

  DNA fingerprinting - DNA fingerprinting is a very quick way to compare the DNA sequence of any two individuals. -     Expressed sequence tags are genes that are expressed as RNA. These are used to identifying all the genes of genome.  Option 1)Genes expressed as RNAOption 2)Polypeptide expressionOption 3)DNA polymorphism Option 4)Novel DNA sequence

Purines found both in DNA and RNA are:

  • Option 1)

    Adenine and thymine

  • Option 2)

    Adenine and guanine

  • Option 3)

    Guanine and cytosine

  • Option 4)

    Cytosine and thymine

  Nucleotide - When a phosphaste group to - oH of a nucleoside through phosphoester linkage. - wherein A corresponding nucleotide (or deoxynucleotide depending upon of sugar present) is formed.       Nucleic acids are composed of 3 components: Nitrogenous bases, 5 carbon sugars, and one or more phospahte groups. Nitrogenous bases are of two kinds i.e, purines and pyrimidines. Adenine and...

What map unit  (Centi morgan) is adopted in the construction of genetic maps?

 

  • Option 1)

    A unit of distance between two expressed genes, representing 10% cross over.

     

  • Option 2)

    A unit of distance between two expressed genes, representing 100% cross over.

     

  • Option 3)

    A unit of distance between gene on chromosomes, representing 1% cross over

  • Option 4)

    A unit of distance between genes on chromosomes, representing 50% cross over.

  Genetic Maps - Genetic maps are widely used as a starting point in the sequence of whole genomes. - wherein In a genetic map, the frequency of recombination between genes pairs on the same chromosomes is a measure of the distance between genes, and 'mapped' their positions on the chromosomes.       A map unit refers to a unit of distance between genes on chromsomes that represent 1% cross...

In Artirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flower were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following:

 

  • Option 1)

    This experiment does not follow the Principle of Dominace

     

  • Option 2)

    Pink colour in F1generation is due to incomplete dominace.

     

  • Option 3)

    Ratio of F2 is \frac{1}{4} (red):\frac{2}{4} (Pink) : \frac{1}{4} (white)

     

     

  • Option 4)

    Law of Segregation does not apply in this experiment.

     

  Incomplete dominance - This can be understood by the inheritance of flower color in (dog flower) - Snapdragon. - wherein The F1 had a  phenotype that aid not resemble either of the two parents and was in between them.     In heritance of pink flower colour in Antirrhium is a example of incomplete dominance. This is a variation of dominance , wherien the dominant - recessive relationship is...

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between the genes was explained by:

 

  • Option 1)

    T.H. Morgan

  • Option 2)

    Gergor . J. Mendel

  • Option 3)

    Alfered Sturtevant

  • Option 4)

    Sutton Boveri

  Recombination - Morgan experimented and found that when the two genes in a hybrid cross situated on same chromosone, the proportion of parental gene combination were much higher than the non-parental type.. Based on this observation, he coined the term recombination. - wherein To describe the generation of non-parental gene combinations     Morgan was the first one to hypothesize the...
gene of flower position pod shape and plant height located on chromosome no. 4 but gene for pod shape and plant height are located sufficiently nearby to show linkage so how can they assort independently ?
These didnot show linkage because Mendel did not crossed them as dihybrid crosses. If he would have then ratio of 9:3:3:1he would not have got. He was lucky enough
what are the examples are enzyme producing blunt ends ?

@Sakshee Rajendra Badhe 

Hae III, Hind II and Alu I are the restriction enzymes which produce blunt ends.

Q. 43 Reverse Transcriptase is

(A) RNA dependent RNA polymerase

(B) DNA dependent RNA ploymerase

(C) DNA dependent, DNA ploymerase

(D) RNA dependent DNA ploymerase

 

Q. 44 Tobacco Mosaic Virus (TMV) genome is

(A) Double stranded RNA

(B) Single stranded RNA

(C) Polyribonucleotides

(D) Proteinaceous.

@Drmohamed ashraf

Q. 44 ans b)

as tobacco mosaic virus is a  single stranded RNA virus.

In which strand of DNA promoter & terminator are present?
Promoter is present on 5′ end of templet strand(upstream),and terminator is present on 3′end of coding strand(downstream)
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