How many meiotic divisions will be needed to produce 44 female gametophytes in angiosperms?
If the codon on m-RNA is AUG, the compatible anticodon on t-RNA is _______.
_______ enzymes are used as biological scissors in r-DNA technology.
(A) Restriction endonucleases
(B) DNA ligases
(C) DNA polymerases
(D) Reverse transcriptases
Vegetative propagation takes place with the help of leaves in _______ plant.
Trichoderma konigi is a source of _______ enzyme.
What is the correct sequence of the stages in bacteriophage lytic cycle?
(A) Attachment, Penetration, Lysis, Multiplication
(B) Attachment, Penetration, Multiplication, Lysis
(C) Lysis, Penetration, Multiplication, Attachment
(D) Attachment, Lysis, Multiplication, Penetration
Edible fruiting bodies are produced by _______.
Give reason : Emasculation is done in a flower which is selected as female parent.
Label the parts (1) and (2) in budding of yeast cell.
Enlist types of DNA library.
What is ecological succession?
Give the role of VAM related to soil fertility.
Give diagrammatic representation of pyramid of numbers.
With the help of a suitable example, explain protandry.
How depletion of ozone layer affects living organisms?
Give graphic representation of cyclic photophosphorylation.
Explain the role of microbes in sewage treatment.
Describe the steps of PCR technique.
Write a note on multiple alleles considering example of human blood groups.
What is ‘biofortification’?
Explain what is meant by biofortification.
Which steps would you follow to develop a new variety of crop plant by selective breeding?
Sketch and label the T.S. of undehisced anther
Describe the process of glycolysis with the help of schematic representation.
Explain semi-conservative replication of eukaryotic DNA.
Elephantiasis is caused by _______.
(A) Wuchereria bancrofti
(B) Plasmodium vivax
Genetically engineered human insulin is obtained by inserting the gene in _______.
(A) Pancreatic cells
(B) E. coli
(C) Agrobacterium tumefaciens
(D) Drosophila melanogaster
Urea splitting bacteria are responsible for _______ types of stones.
(A) calcium oxalate
(B) calcium phosphate
(C) calcium carbonate
The connecting link between ‘ape’ and ‘man’ is _______.
(C) Homo erectus
(D) Homo neanderthalensis
Crippling disease is caused due to poisoning of _______ .
The genetic marker used as key factor in DNA fingerprinting is _______.
(D) DNA probes
The trophoblast cells in contact with embryonal knob are called _______ .
(A) Inner mass cells
(C) Amniogenic cells
(D) Cells of Rauber
Mention any ‘two’ methods used to prevent spoilage of fish
Define the term ‘genome’.
Define organic evolution.
What is meant by organic evolution?
What is criss-cross inheritance?
Mention any ‘two’ functions of uterus.
What is Red Data Book?
Sketch and label the structure of chromosome.
Explain the concept ‘survival of the fittest’.
Give economic importance of apiculture
Give the importance of transgenic animals.
Explain sex determination in human beings.
How is sex determined in human beings?
Explain the mechanism of sex determination in human being
Describe T.S. of the spinal cord.
Explain the structure of antibody.
Give the effects of air pollutants on human health
Sketch and label ‘L.S. of human kidney’
With the help of a labelled diagram describe the internal structure of human heart.
With the help of a suitable diagram, describe the conducting system of human heart