Genetics

Removal of nitrons and joining of exons in a defined order during transcription is called :

Molecular basis of organ differentiation depends on the modulation in transcription by

Removal of introns and joining the exons in a defined order in a transcription unit is called:

Removal of RNA polymerase III forms mucleoplasm will affect the synthesis of:

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a ‘triplet’

The one aspect which is not a salient feature of genetic code, is its being:

Which one of the following is not a part of a transcription unit in DNA?

The unequivocal proof with dominant material came from the studies on a

One gene-one enzyme relationship was established for the first time in

Which mendelian idea is depicted by a cross in which the F₁ generation resembles both the parents?

Which one of the following also acts as a catalyst ina bacterial cell?

Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac Y gene?

Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?

One of the most frequency used techniques in DNA fingerprinting is

Which one of the following is not a property of the genetic code?

Semi-conservative replication of DNA was first demonstrated in:

If one strand DNA has the nitrogenous bas sequence at ATCTG, what would be the complementary RNA strand sequence

Inheritances of skin colour in humans is an example of

The incorrect statement with regard to Haemophilia is:

A sequential expression of a set of human genes

Genetic variation in a population arises due to

In an inducible operon, the genes are

Down’s syndrome in humans is due to

Infectious proteins are present in:

Uridine, present only in RNA is a

Satellite DNA is useful tool in:

Mutations can be indued with:

Point mutation involves:

T.O. Diener discovered a:

Which one of the following cannot be explained on the basis of Mendel’s Law of Dominance?

Which one of the incorrect statement with regards to the importance of pedigree analysis?

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F₂ segregation will show

Select the correct statement from the ones give below with respect to dihybrid cross.

The genetic defect-Adenosine deaminase (ADA) deficiency may be cured permanently by:

Haploids are more suitable for mutation studies than the diploids. This is because

When two unrelated individuals or lines are crossed, the performance of F hybrid is often superior to both parents. This phenomenon is called

A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?

Select the two correct statements out of the four(a-d) give below about lac operon.
(i) Glucose or galactose may bind with the repressor and inactive it
(ii) In the absence of lactose the represor binds with the operator region
(iii) The z-gene codes for permease
(iv) This was elucidated by Francois Jacob and Jacque Monod.
The correct statements are:

If two persons with ‘AB’ blood group marry and have sufficiently large number of children these children could ve classified as ‘A’ blood gorup: ‘AB’ blood group: ‘B’ blood group in 1 : 2 : 1 ratio. Modern technique of protein eletrophoresis reveals presence of both ‘A’ and ‘B’ type proteins in ‘AB’ blood group individuals. This is an example of:

During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?

The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?

Which of the following statements is not true of two genes that show 50% recombination frequency?

Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly mathced with the category mentioned against it?

Which one of the following condition in humans, is correctly matched with its chromosomal abnormality / linkage?

Which one of the following conditions correctly describes the manner of determining the sex in the given example?

Which one of the following is a wrong statement regarding mutations?

Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

Select the incorrect statement about health from the following:

In our society women are blamed for producting female children. Choose the correct answer for the sex-determination in humans

Which of the following forms the basis of DNA Finger printing?

Read the following four statements (A-D).
(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulations.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.
How many of the above statements are correct

The cross in plants or in Drosophila involves crossing

A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid cetrificate of his own blood type of offers blood donation without delay. What would have been the type of blood group of the donor friend?

A normal-visioned man whose father was colour. Blind, marries a woman whose father was also colour blind. They have their first child as a daughter. What are the chance that this child would be colour blind?

The okazaki fragments in DNA chain growth

What is not true for genetic code?

A test cross is carried out to

Sickle cell anaemia is:

In the DNA molecule

A dihybrid plant on self pollination, produces 400 phenotypes with 4 type of genotype. How many seeds will have genotype TtRr?

Who discovered jumping genes in maize?

Which of the following situation will be fatal to first foetus?

Which of the following is the unit DNA?

Which of the following is not a X-linked recessive disease?

Which of the following is initiation codon?

Which of the following is a recessive trait in garden pea?

Which of the following cross will give tall and dwarf pea plants in same (equal) proportions?

Which is not related with eukaryotic mRNA?

When a tall and red flowered individual is crossed with a dwarf and white flowered individual, phenotype in the progeny is tall and red. What will be the genotype of tall and red flowered progeny?

When a dwarf pea plant was treated with gibberellic acid, it became as tall as tall pea plants. If these pea plants are crossed with pure tall plants, then what will be the phenotypic ratio in F₁ generation?

What does the following indicate ? Parent R¹R¹(Red) × R²R²(White) F₁ R¹R²(Pink) F² 1/4 Red : 1/2 Pink : 1/4 White

Unwinding of DNA is done by

Trisomy is expressed as

Transition type of gene mutation is caued when

There are special proteins that help to open up DNA double helix in front of the replication fork. These proteins are

There are 64 codons in the genetic dictionary as

The trisomy for 21st chromosome is called

The triplet UUU codes for

The smallest RNA molecules are

The rule that in a DNA the amount of adenine equals to that of the thymine and that of guanine equals to that of cytosine is known as

The process of transfer of genetic information from DNA to RNA is

The possible blood groups of children born to parents having A and AB groups are

The number of chromosomes present in the cells of the bread wheat Triticum aestivum suggests that it is

The number of autosomes in human female is

The most important example of point mutation is found in a disease called

The loss of one single chromosome creates a condition called

The jumping gene in maize were discovered by

The genes, which remain confined to differential region of Y-chromosome are

The genes controlling seven traits in pea, as studied by Mendel, were later found to be located on how many number of chromosomes?

The functional unit of mutation is

The douple helix model of Watson and Crick is known as

The difference between RNA and DNA is because of

The condition trisomic is referred to as

The complete set of chromosomes, inherited as a single unit from one parent is known as

The 1 : 2 : 1 ratio among pink flowers indicates the phenomenon of

Test cross is a cross in between hybrid and

Structure of complete enzyme RNA polymerase includes

Select the statement which is not correct?

RNA contains which of the following type of sugar?

Right handedness is dominant over left handedness. Most probable gene types with 2 right handed parents having left handed child is

Ribose sugar is present in

Rh factor is present in

Recombination of the alleles of two genes A and B following crossing over will hypothetically result in four allelic recombinations. In the absence of crossing over the two parental combinations would be formed as

Pnenylketonuria is an autosomal recessive disorder located on chromosome

Persons who are colour blind can not distinguish?

Percentage of recombination between A and B is 9%, A and C is 17%, B and C is 26%, then the arrangement of genes is

Operon model for regulation of transcription was proposed by

Number of (approximately) genes in E. coil are

Mutations caused by mutagenic agents are termed as

Mendel did not observe linkage due to

Masking the character of one gene by other gene is known as

Linkage was discovered by

Ligase is an enzyme required for

Lac operon (ZYA genes) was proposed by Jacob and Monod in the year

Klinefelter’s syndrome is caused

Klinefelter’s syndrome has number of chromosomes

Isotopes used for providing semi conservative replication of DNA are

In transcription the terminating factor is

In sickel-cell anaemia, which of the following amino acids is substituted?

In prokaryotes, the genetic material is

In Pisum sativum there are 14 chromosomes. How many pairs with different chromosomal composition can be prepared?

In Mirabilis jalapa, when red colour flowers were crossed with white flowers, pink colour flowers were obtained. It was due to

In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes?

In man, the blue eye colour is recessive to the brown eye colour. If the boy has brown eye and his mother is blue eyed, what weould be the phenotype of his father?

In F₂ generation, a ratio of 1 : 4 : 6 : 4 : 1 is obtained instead of 9 : 3 : 3 : 1. It indicates

If the sequence of bases in DNA is ATTCGATG, then the sequence of bases in its transcript will be

If a boy’s father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease?

If %age of cytosine is 18%, then %age of adenine will be

Human chromosome number was determined correctly by

Haemophilia is due to mutation in

Gynaeocomastia is found in

Genetic map of chromosome are based on

Gametes are never hybrid. This is a statement of

G. Mendel used the plant

From a diploid condition of 2N, which condition can arise due to non-disjunction of chromosomes?

From a cross AABb × aaBb, the genotypes AaBB : AaBb : Aabb : aabb will be obtained in which of the following ratio?

Escherichia coli with completely radioactive DNA was allowed to replicate in non-radioactive medium for two generations. Percentage of bacteria with radioactive DNA is

During DNA replication, the term leading strand is applied to the one which replicates in

Down’s syndrome is caused due to an extra chromsome in

DNA synthesis can be specifically measured by estimating the incorporation of radio-labelled