Structure Function Relationships MCQ

Test your knowledge with important Structure Function Relationships MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Structure Function Relationships MCQs at Bissoy

• Which property is shown by a molecule whose electron is raised to a higher energy level?
  ক

  Lesser tendency to accept an electron

  খ

  Greater tendency to accept an electron

  গ

  Lesser tendency to donate an electron

  ঘ

  Greater tendency to donate an electron
• Chlorophyll is the essential photosynthetic pigment.
  ক

  False

  খ

  True
• The first role of carotenoids is as a “quencher”.
  ক

  True

  খ

  False
• Which among the following is the central metal ion in chlorophyll?
  ক

  Fe+3

  খ

  Mg+1

  গ

  Fe+2

  ঘ

  Mg+2
• Which of the following phenomenon is key to the conversion of light energy to chemical energy?
  ক

  Proton transfer

  খ

  Electron excitation

  গ

  Electron degradation

  ঘ

  Electron transfer
• Which of the following is not true for chloroplasts?
  ক

  It holds 70S ribosomes

  খ

  It is semi-autonomous

  গ

  It divides by binary fission

  ঘ

  It has linear ds DNA
• Electrons are most stable at their highest energy level.
  ক

  True

  খ

  False
• Which of the following is the site of photosynthetic light reactions in plants?
  ক

  Mitochondrial membrane

  খ

  Chloroplast membrane

  গ

  Cellular membrane

  ঘ

  Thylakoid membrane
• Which of the following is used in the Calvin cycle to fix carbon dioxide into triose sugars?
  ক

  Either ATP or NADPH

  খ

  Only ATP

  গ

  Only NADPH

  ঘ

  Both ATP and NADPH
• Which of the following is not an electron acceptor in the electron transport chain of plants?
  ক

  Quinone

  খ

  Ferredoxin

  গ

  Plastoquinone

  ঘ

  Phycobilins
• Light is made up of small bundles of energy. What are these bundles called?
  ক

  Protons

  খ

  Electrons

  গ

  Proteins

  ঘ

  Photons
• Photosynthetic reaction centers are present only in plants.
  ক

  True

  খ

  False
• Which of the following is responsible for the primary energy conversion reactions of photosynthesis?
  ক

  Electron transport center

  খ

  Rhodopsin

  গ

  Photooxidation center

  ঘ

  Photosynthetic reaction center
• After photoisomerization of the retinal molecule, which amino acid residue becomes a proton acceptor of the donor proton from the retinal molecule?
  ক

  Met69

  খ

  Ala93

  গ

  Lys216

  ঘ

  Asp85
• Which of the following conformation is showed by retinal after absorbing light?
  ক

  Bent trans

  খ

  Straight cis

  গ

  Straight trans

  ঘ

  Bent cis
• Which of the following bacterium is prominently known to contain bacteriorhodopsin?
  ক

  Aspergillus niger

  খ

  Entamoeba histolytica

  গ

  Escherichia coli

  ঘ

  Halobacterium salinarum
• The function of rhodopsin and bacteriorhodopsin is the same.
  ক

  True

  খ

  False
• What is the absorption maximum of bacteriorhodopsin?
  ক

  448 nm

  খ

  706 nm

  গ

  346 nm

  ঘ

  568 nm
• Which of the following is true for the cytoplasm of Halobacteria?
  ক

  It has fewer protons

  খ

  It is neutral

  গ

  It is highly acidic

  ঘ

  It is highly alkaline
• Which of the light powers the pumping of the protons across the membrane via bacteriorhodopsin?
  ক

  Infrared light

  খ

  Red light

  গ

  Ultraviolet light

  ঘ

  Greenlight
• Which of the following conformation is showed by retinal before absorbing light?
  ক

  Bent trans

  খ

  Bent cis

  গ

  Straight cis

  ঘ

  Straight trans
• Which of the following is true for bacteriorhodopsin?
  ক

  It is an extrinsic protein

  খ

  It is a lipid-anchored protein

  গ

  It is a peripheral protein

  ঘ

  It is an integral membrane protein
• The interaction of retinal with the helix G is of which type?
  ক

  Hydrophobic interaction

  খ

  Non-covalent interaction

  গ

  Hydrophobic interaction

  ঘ

  Covalent interaction
• How many transmembrane segments are present in the structure of bacteriorhodopsin?
  ক

  Nine transmembrane helices

  খ

  Eight transmembrane helices

  গ

  Six transmembrane helices

  ঘ

  Seven transmembrane helices
• Bacteriorhodopsin acts as a proton pump.
  ক

  False

  খ

  True
• The expression of bacteriorhodopsin is especially shown by which of the following organisms?
  ক

  Mammals

  খ

  Animals

  গ

  Birds

  ঘ

  Halobacteria
• Bacteriorhodopsins contain which of the following pigments?
  ক

  Chlorophyll

  খ

  Phycobilins

  গ

  Xanthophylls

  ঘ

  Retinal
• Which of the following protein can capture light energy?
  ক

  Glycophorin

  খ

  GLUT 1

  গ

  T cell receptor

  ঘ

  Bacteriorhodopsin
• Which of the following is not a peripheral membrane protein?
  ক

  Phospholipases

  খ

  Bcl-2

  গ

  Signal peptidase

  ঘ

  DNA polymerase
• Which of the following is a peripheral membrane protein?
  ক

  Glucose permease

  খ

  Glycophorin

  গ

  GPCRs

  ঘ

  G proteins