Select the correct pair of microorganism and the product obtained from it.
Monascus purpureus- produces large holes in Swiss cheese.
Saccharomyces cerevisiae - used for making wine and beer after distillation
Streptococcus - produces streptokinase which is used to remove clots.
Aspergillus niger - produces citric acid and butyric acid.
Choose the correctly matched pair from the following.
Gonorrhoea, hepatitis B- sexually transmitted diseases
AIDS, gonorrhoea - viral infection
Diphtheria, ringworm - fungal infection
Diphtheria, tuberculosis - protozoan infection
Select the correct sequence for Homo erectus
Erectus homo primata chordata animalia
Homo erectus primata animalia chordata
Homo erectus primata chordata animalia
Erectus homo animalia primatachordata
Identify the give figure and select the correct option
Neutrophil- phagocytic cell which destroy foreign organisms entering the body.
Eosinophil- their number increases during allergic infection.
Lymphocyte - small sized non-motile and non-phagocytic.
Monocyte - motile and phagocytic in nature.
Which antibiotic has bactericidal effect
Erythromycin
Streptomycin
Penicillin
Chloramphenicol
C.
Penicillin
Penicillin has bactericidal effect i.e., they kill bacteria by inhibiting cell wall synthesis.
Erythromycin, Streptomycin, Chloramphenicol produces bacteriostatic effect.
Streptomycin-Streptomycin is a protein synthesis inhibitor. It binds to the small 16S rRNA of the 30S subunit of the bacterial ribosome, interfering with the binding of formyl-methionyl-tRNA to the 30S subunit.
Erythromycin- It inhibits bacterial protein synthesis by binding to bacterial 50S ribosomal subunits; binding inhibits peptidyl transferase activity and interferes with translocation of amino acids during translation and assembly of proteins.
Chloramphenicol- It prevents protein chain elongation by inhibiting the peptidyl transferase activity of the bacterial ribosome. It specifically binds to A2451 and A2452 residues in the 23S rRNA of the 50S ribosomal subunit, preventing peptide bond formation.
Which of the following statements is not true
The biodiversity decreases with increasing latitude.
The biodiversity decreases with increasing altitude.
The fishes show greatest biodiversity among vertebrates.
The biodiversity of bryophytes is greater than that of angiosperms
Which of the following options consist of nonessential amino acids only
Valine, leucine, glycine, alanine
Glycine, serine, proline, glutamic acid
Proline, aspartic acid, glutamic acid, methionine
Cysteine, tyrosine, alanine, isoleucine
Photochemical smog formed in congested metropolitan cities mainly consists of
ozone, peroxyacyl nitrate and NOx
smoke, peroxyacyl nitrate and SO2
hydrocarbons, SO2 and CO2
hydrocarbons, ozone and SO2
How are transformants selected from nontransformants
Presence of more than one recognition site in the vector DNA.
Presence of alien DNA into the vector DNA results into insertional inactivation of selectable marker.
Antibiotic resistance gene gets inactivated due to insertion of alien DNA.
Both (b) and (c).
Which of the following is not a character of cancerous cells in our body
Contact inhibition
Neoplasia
Metastasis
Inability for differentiation