Class X

Sum of all biochemical reactions in body are referred to as
  1. Biochemistry
  2. Metabolism
  3. Molecular biology
  4. Condensation
 Cancer may start when
  1. Diploid number of chromosomes become defective
  2. Changes occur in genes controlling cell divisions
  3. When loci start to change in chromosomes
  4. All of above
Monomer of nucleic acid is
  1. Amino acid
  2. Peptides
  3. Nucleotide
  4. Lipid
 All is true for dicotyledons but
  1. Dicotyledons are a type of gymnosperms
  2. Have leaves with blades
  3. Have leaves with petioles
  4. None of above
Sodium-potassium (NA+ -K+) pump is a type of
  1. Carrier protein
  2. Enzyme
  3. Is not found in animal cells
  4. Is very common in all plant cells
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