Q. 1
Proteins having a polyhistidine tail can be separated by affinity chromatography using
  • a. Cadmium
  • b. Silver
  • c. Iron
  • d. Lead
  • e. Nickel
  • Answer: E

  • Explaination: Explanation: Nickel has a high affinity towards histidine residues. So, a column with nickel attached to it can be used to perform affinity chromatography for proteins with polyhistidine tails.
Q. 2
The metal ion present at the centre of porphyrin ring of chlorophyll is
  • a. Fe
  • b. Mg
  • c. Co
  • d. Cu
  • e. Mn
  • Answer: B

  • Explaination: Explanation: Magnesium is the metal ion present at the centre of porphyrin ring of chlorophyll. The structure is very similar to that of haemoglobin which contains iron at the centre of porphyrin ring.
Q. 3
Which of the following protects membrane lipids from free radicals?
  • a. Vitamin A
  • b. Vitamin B1
  • c. Vitamin D
  • d. Vitamin E
  • e. Vitamin K
  • Answer: D

  • Explaination: Explanation: Vitamin E is a fat-soluble vitamin composed of isoprene units. It protects membrane lipids from free radicals and reactive oxygen species. Absence of vitamin E causes fragility of membranes.
Q. 4
Proteins are transported from endoplasmic reticulum to golgi complex by
  • a. Ribosomes
  • b. Lysosomes
  • c. Vesicles
  • d. Mitochondria
  • e. Microtubles
  • Answer: C

  • Explaination: Explanation: Vesicles are bubble-like membranous structures that store and transport cellular products. Proteins that are produced by ribosomes in rough endoplasmic reticulum are transported to golgi complex by means of vesicles. These transport vesicles bud from specialized regions of ER called as ER exit sites.
Q. 5
Synthesis of ATP takes place in
I. Chloroplast
II. Mitochondria
III. Golgi apparatus
IV. Endoplasmic reticulum
V. Ribosome
  • a. Both I and II
  • b. Both II and III
  • c. II, III and IV
  • d. I, III and V
  • e. Only II
  • Answer: A

  • Explaination: Explanation: The ATP synthesis in plants takes place in chloroplast as in mitochondria of animals. In plants the process is termed as photophosphorylation. The mechanism of ATP synthesis in both the organelles is very similar. ATP syntheses is the enzyme that is involved in this process.
Q. 6
Presence of pentamerous radial symmetry is a characteristic feature of
  • a. Phylum Chordata
  • b. Phylum Annelida
  • c. Phylum Echinodermata
  • d. Phylum Mollusca
  • e. Phylum Arthropoda
  • Answer: C

  • Explaination: Explanation: Echinoderms possess a body symmetry that can be divided into five parts as in star fish. This is called as pentamerous radial symmetry. Phylum Chordata, Annelida, Mollusca and Arthropoda possess bilateral symmetry.
Q. 7
Climax community is
  • a. A stable mature ecological community
  • b. An unstable ecological community
  • c. A community with endangered species
  • d. A community with extinct species
  • e. A community with vulnerable species
  • Answer: A

  • Explaination: Explanation: The final stage in ecological succession, which contains stable population until and unless any disturbance is made is called a climax community. This stable equilibrium stage is obtained through many evolutionary stages and environmental adaptations. Biome is a climax community.
Q. 8
Haversian canal is present in
  • a. Eyes
  • b. Lungs
  • c. Heart
  • d. Cartilage tissue
  • e. Bone
  • Answer: E

  • Explaination: Explanation: Haversian canal is the canal which runs parallel to the long axis of the bone. It is surrounded by concentric rings of lamellar bone where the osteocytes are present. It contains blood vessels, nerves and lymph vessels. Haversian canals are interconnected by Volkmann???s canals.

Score: 0/8