Cancer causing gene is
A. protooncogene
B. oncogene
C. transposon
D. mutable gene
Select an option to see the answer and solution.
Organs having different structure and components but perform similar functions are called . . . . . . . .
A. Analogous organs
B. Homologous organs
C. Heterogeneous organs
D. Homogeneous organs
Select an option to see the answer and solution.
Choose the correct sequence during formation of chemicals on early Earth
A. Ammonia, water, nucleic acid and protein
B. Ammonia, protein, carbohydrates and nucleic acid
C. Ammonia, nucleic acid, protein and carbohydrate
D. Protein, carbohydrate, water and nucleic acid
Select an option to see the answer and solution.
The amino acids used in protein synthesis are activated by ATP in the presence of specific activating enzymes called
A. Pyrophosphates
B. Aminoacyl synthetases
C. Aminoacyl dehydrogenases
D. Aminoacyl reductases
Select an option to see the answer and solution.
The phenomenon of inheritance of genes together and to retain their parental combination even in the offsprings is known as
A. Linkage
B. Crossing over
C. Segregation
D. Back cross
Select an option to see the answer and solution.
In the context of genetic disorder, consider the following.
A women suffer from colour blindness, while her husband does not suffer from it. They have a son and a daughter. In this context, which one of the following statement is most probably correct?
A. Both children suffer from colour blindness
B. Daughter suffer from colour blindness while son does not suffer from it
C. Both children do not suffer from colour blindness
D. Son suffers from colour blindness, while daughter does not suffer from it
Select an option to see the answer and solution.
Which of the following is a base analog?
A. Hydroxylamine
B. 5 bromouracil
C. Nitrous acid
D. All of the above
Select an option to see the answer and solution.
The gene pool of a given population may be changed by
A. Speciation
B. Isolation
C. Hybridization
D. Pureline selection
Select an option to see the answer and solution.
Aqueous suspensions of the kinds of polymers that might have been abiotically synthesised on primitive earth, when heated form spherical aggregates called coacervates. This was disccvered by
A. Oparin and Sydney Fox
B. Oparin and Darwin
C. Darwin and Louis Pasteur
D. None of the above
Select an option to see the answer and solution.
The first step in protein synthesis, in prokaryotes, is the formation of
A. 45 S initiation complex
B. 30 S initiation complex
C. 60 S initiation complex
D. None of the above
Select an option to see the answer and solution.
Which of the following is an artificial inducer commonly used in experimental work?
A. Beta-galactosidase
B. Isopropylthiogalactoside
C. Allolactose
D. Tryptophan
Select an option to see the answer and solution.
Mammoth is the ancestor of
A. dog
B. horse
C. camel
D. elephant
Select an option to see the answer and solution.
According to which of the following theories, "evolution is a result of mutation, with the recombination of genes through biparental reproduction under the influence of natural selection over long periods of time"?
A. Neo-Darwinism
B. Neo-Lamarckism
C. Biogenetic law
D. Weismann's theory
Select an option to see the answer and solution.
Which one of the following is not a genetic disorder?
A. Colour blindness
B. Down's syndrome
C. Haemophilia
D. Xerophthalmia
Select an option to see the answer and solution.
The theory that dinosaurs were driven to extinction by the aftermath of a large asteroid impact on Earth was given by . . . . . . . .
A. Wilhelm Rontgen
B. Luis Alvarez
C. Henry Moseley
D. William Crookes
Select an option to see the answer and solution.
The capacity of mature cells, when freed from the plant body, to reorganize themselves into new individuals is known as
A. Apomixis
B. Parthenogenesis
C. Totipotency
D. Somatic mutation
Select an option to see the answer and solution.
The process of transforming the discontinuous fragments (Okazaki fragments) into a continuous molecule is referred to as
A. Transformation
B. Maturation
C. Transposition
D. Transcription
Select an option to see the answer and solution.
The plants where intraseminal growth is absent and the seedlings are formed by the globose embryos, the embryonal pole distal to the micropyle is called the
A. Axial pole
B. Annular pole
C. Plumular pole
D. Radicular pole
Select an option to see the answer and solution.
Sexual reproduction causes genetic variation because of
A. blending of genes
B. chromosomal changes
C. shuffling of genes
D. All of the above
Select an option to see the answer and solution.
The concept of catastrophism was replaced by the theory of uniformitarianism due to the landmark investigations of
A. James Hutton
B. John Playfair
C. Sir Charles Lyell
D. All of the above
Select an option to see the answer and solution.