1st Year Biology Chapter 11 Notes
Important Complete Computerized 1st Year Biology Chapter 11 Notes Bioenergetics written by Professor Mr. Adnan Haider Suib. These notes are very helpful in the preparation of Bioenergetics of First Year Biology for the students of the intermediate and these are according to the paper patterns of all Punjab boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- Our comprehensive 1st Year Biology Chapter 11 Notes will ensure you're fully prepared for your exams.
- 1. Chlorophyll a is: (a) Orange green (b) Blue green (c) Yellow green dark (d) Yellow green
- 3. Which chloropylls are found in algae and photosynthetic plants? (a) c and b (b) A and b (c) a and c (d) a , b , c and d
- 4. Which wavelengths are mainly absorbed by chlorophyll? (a) Green and blue (b) Red and indigo (c) Violet and orange (d) Violet blue and orange red
- 5. Magnesium is an important nutrient in green plants as it is an essential component of: (a) Chlorophyll (b) Hemoglobin (c) Protein (d) Glucose
- 6. Magnesium is present in which part of chlorophyll? (a) Haem portion (b) Porphyrin ring (c) Pyrrole ring (d) Phyto tail
- 7. Which statement about chlorophyll a is not true? (a) It contains phytol tail (b) It contains magnesium (c) It contains porphyrin ring (d) It contains terminal carbonyl group
- 8. The colour of chlorophyll b is: (a) Blue - green (b) Orange - red (c) Orange - green (d) Yellow - green
- 9. Photosyntheis is a ………. process. (a) Oxidize (b) Redox (c) Both A & B (d) None of these
- 10. The process of photosynthesis consists ……… parts. (a) 4 (b) 3 (c) 2 (d) 1
- 11. Photosystem II has the form of chlorophyll a which absorbs best light of: (a) 690 nm (b) 680 nm (c) 700 nm (d) 670 nm
- 12. Chlorophyll " a " of photosystem I absorbs maximum light of: (a) 680 nm (b) 690 nm (c) 700 nm (d) 670 nm
- 13. The products of photosynthetic light reactions are: (a) ATP and NADPH (b) ATP and NAD (c) ATP , NADPH and O2 (d) ATP and NADH
- 14. Light can work in photosynthesis if only it is: (a) Transmitted (b) Refracted (c) Absorbed (d) Reflected
- 15. Haem portion of hemoglobin contains an atom of: (a) Magnesium Mg++ (b) Iron Fe++ (c) Calcium Ca++ (d) Phosphorus K++
- Plastocyanin protein contains: (a) Iron (b) Potassium (c) Copper (d) Magnessium
- What is thylakoid?
Ans: In photosynthetic organisms, chloroplasts have vesicles a wall of which bears photosynthetic pigments, called thylakoid. They vary in form and arrangement in different
groups of organisms.
- What is the function of stomata ? Ans: Stomata are pores present in the epidermis of plants in large numbers, particularly in
leaves, through which gaseous exchange takes place.
- Define grana.
Ans: In chloroplasts group of disc-shaped, flattened vesicles stacked like coins in a pile, vesicle membranes bearing photosynthetic pigments are called grana. They are most highly
developed in chloroplasts of higher plants.
- how did the evolution of photosynthesis affect the metabolic pathway ? With the emergence of photosynthesis on earth, molecular oxygen began to accumulate
slowly in the atmosphere. The presence of free oxygen made possible the evolution of
respiration.
Respiration releases great deal of energy, and some of this energy is used in the
formation of adenosine triphosphate (ATP) molecules. ATP is a kind of chemical link
between catabolism and anabolism.
- Q14: Give the outline of Krebs cycle. (Description is not required). (v.imp)
- Q15: Write a note on respiratory chain.
- Q16: Describe respiratory electron transport chain.