Explain the type of chromosome on the basis of position of centromere with diagram
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Q.2 (a) How is peptide bond formed? Draw structure. (b) Give an example of competitive inhibition of enzyme action
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Q.3 Explain the cell cycle with diagram .
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Q.4 write three differences between cyclic and noncyclic photophosphorylation
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Q.5 explain the types of flowers according to the position of ovary. And also make diagram
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Q.6 write the name of phylum belongs to these following features..(i)stinging cells, (ii) parapodia (iii) malpighian tubule (iv) radula
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Q.7 explain the mitosis cell division with diagram
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Q.8 (a)Write the full form of rubisco. (b) name the first stable product of C3 cycle. (c) why meiosis is called reductional division.? (d) what is crossing over. (e) . What is synaptonemal complex
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Q.9 correlate column A with column B. Column A. Column B leptotene. Crossing over. Zygotene. Thin chromosom. Pachytene terminataion chiasma. diplotene. Homologus pair diakinesia. Chiasma formation
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Q.10 define photophosphorylation and also make diagram of non cyclic photophosphorylation
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Q.11 To which class of algae do the following belongs to. (i) ulothrix. (ii) Ectocarpus. (iii) polysiphonia. (iv) chara
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Q.12 write the name of pigments,stored food and flagella of chlorophyceae, phaeophyceae, rhodophyceae
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Answer:
01: The chromosomes in which the centromere is present in the middle and divides the chromosome into two equal arms is known as a metacentric chromosome. During anaphase, they appear V-Shaped. The chromosome in which the centromere is slightly away from the middle region is known as a sub-metacentric chromosome.
02: Peptide bonds are formed when the amine group of one amino acid binds with the carbonyl carbon of another amino acid. We will learn more about peptide bonds and how the cleaving process occurs. An example of competitive inhibition was demonstrated experimentally for the enzyme succinic dehydrogenase, which catalyzes the oxidation of succinate to fumarate in the Krebs cycle. Malonate binds to the active site of succinic dehydrogenase so that succinate cannot. Thus, it inhibits the reaction.
03: The cell cycle is an ordered series of events involving cell growth and cell division that produces two new daughter cells. Cells on the path to cell division proceed through a series of precisely timed and carefully regulated stages of growth, DNA replication, and division that produces two identical (clone) cells.
04: Cyclic photophosphorylation Non-cyclic photophosphorylation
1- It occurs in photosystem I. 1- It occurs in both photosystem I and photosystem II.
2- Only Atp is produced 2- Both ATP and NADPH are produced.
3- Electrons expelled by photosystem and return back. 3- Electrons expelled by photosystem but do not return back.
4- Photolysis of water does not occur. 4- Photolysis of water occur.
5- Oxygen is not released. 5- Oxygen is released.
6- Water is not consumed. 6- Water is consumed
05: Flower types are based on the position of the ovary in a flower. There are three categories: hypogynous, perigynous, and epigynous. (a) hypogynous, if sepals, petals and stamens are attached to the receptacle below the ovary.
