Find the incorrect statement(s) about photosynthesis from the following:
(A) The water splitting complex is associated with PS I. (B) C4 plants use the C3 pathway of CO2 fixation as the main biosynthetic pathway. (C) In C4 plants, photorespiration does not occur. (D) C3 plants exhibit Kranz anatomy. (E) ATP synthesis in chloroplast occurs through chemiosmosis.
Choose the correct answer from the options given below:
Water splitting occurs in PS II, not PS I. Kranz anatomy is a feature of C₄ plants, not C₃ plants. Statements B, C and E are correct.
Identify the correct statements about biomolecules.
(A) Lipids are generally water soluble. (B) Proteins are polypeptides. (C) Polysaccharides are long chains of sugars. (D) Adenine and guanine are substituted pyrimidines. (E) Almost all enzymes are proteins.
Choose the correct answer from the options given below:
Lipids are generally insoluble in water. Adenine and guanine are purines, not pyrimidines. Proteins are polypeptides, polysaccharides are polymers of sugars, and almost all enzymes are proteins.
Glycolysis occurs in the cytoplasm, ETS on the inner mitochondrial membrane, protons accumulate in the intermembrane space and the Krebs cycle occurs in the mitochondrial matrix.
Which of the following statements are correct with respect to DNA separation, isolation and visualization?
(A) The cutting of DNA is done by molecular scissors. (B) The DNA fragments separate according to their size in an agarose gel upon electrophoresis. (C) The separated DNA fragments can be seen without staining when exposed to UV light. (D) The separated DNA fragments, when stained with ethidium bromide, can be seen under UV light.
Choose the correct answer from the options given below:
Restriction endonucleases are molecular scissors. DNA fragments separate by electrophoresis. Ethidium bromide-stained DNA fluoresces under UV light, not without staining.
Insertion of a foreign DNA at BamHI site in an E. coli cloning vector pBR322 results in the loss of antibiotic resistance towards:
The BamHI restriction site lies within the tetracycline resistance gene (tetR) of pBR322. Insertional inactivation results in loss of tetracycline resistance.