1st Year Chapter 11.docx

Sitara Science Academy Biology 1styear

Chapter 11 (Bioenergetics)

Name:_________________________________________________________

Total marks: 50

Encircle the correct options. (1X15=15 Marks) i) Thylakoid sacs and stacked in columns is called__________. a) Stroma b) Cristae c) Grana d) Cistarnae ii) Which chlorophyll converts chemical energy into light energy? a) Chlorophyll c b) Chlorophyll d c) Chlorophyll a d) Chlorophyll b iii) The process by which pH gradients across the membrane drives the formation of ATP? a) Photosynthesis b) Chemosynthesis c) Chemiosmosis d) Photorespiration iv) The first in glycolysis is the transfer of a phosphate group from ATP to_______ a) Pyruvic acid b) Glycerol c) Fructose d) Glucose v) Chlorophyll absorbs mainly wavelength of a) Yellow color b) Violet Blue color c) Indigo color d) Green Color vi) Photosynthetic pigments are the substances that absorb visible light having wavelengths: a) 420-840 nm b) 150-340 nm c) 230-450 nm d) 380-750 nm vii) Total photosynthesis carried out by terrestrial plants is about a) 20 % b) 05 & c) 15 % d) 10 % viii) Source of oxygen released during photosynthesis is a) Carbon dioxide b) Water c) Both (a) & (b) d) None of these ix) Magnesium is an important nutrient ion in green plant as it is an essential component of a) Protein b) Lipid c) Starch d) Chlorophyll x) Synthesis of ATP in the presence of Oxygen a) Oxidative Phosphorylation b) Photophosphorylation c) Reductive phosphorylation d) Redox Phosphorylation xi) Which one is not an accessory pigment? a) Carotene b) Chlorophyll a c) Xanthophyll d) Chlorophyll b xii) Glycolysis is the breakdown of glucose upto the formation of a) ATP c) Pyruvic acid c) Sulphuric acid d) NAD xiii) Photosystem I has chlorophyll a molecule which absorbs maximum light of 700 nm and is called: a) P900 b) P600 c) P800 d) P700 xiv) T.W Engelmann worked on ________ for the first action spectrum? a) Chlaymydomonas b) Spirogyra c) Volvox d) Euglena xv) Magnesium of chlorophyll is replaced in haemoglobin by ________. a) Calcium b) Potassium c) Iron d) Phosphorus Answer the following short questions (2X12=24 Marks) i) ii) iii) iv) v)

What do you know about compensation point? Differentiate between chlorophyll a & chlorophyll b? Why Calvin Cycle is also known as C3 Pathway? What is Rubisco? Define light and Dark reactions?

vi) vii) viii) ix) x)

Define photosystem? Explain the structure of chlorophyll? Define Bioenergetics? Give molecular formula for chlorophyll a & chlorophyll b? What are accessory pigments? State their role?

Answer the following Long Questions: i)Describe different steps occurring during Non-Cyclic Phosphorylation?

(6)

ii) Write a short note on Chemiosmosis?

(5)