JNTU
JNTU B.Pharmacy III CELL AND MOLECULAR BIOLOGY Previous Question Paper (January/February - 2023 - R17)
Note: i) Question paper contains two parts, Part A, Part B.
ii) Part A is compulsory which carries 25 marks. Answer all questions in Part A.
iii) In Part B answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is a plasma membrane.
Answer
The plasma membrane is a selectively permeable biological membrane that encloses the cell's cytoplasm, composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates. It regulates the passage of substances in and out of the cell to maintain homeostasis.
Write the differences between eukaryotic and prokaryotic cell.
Answer
Eukaryotic cells possess a well-defined nucleus enclosed by a nuclear membrane and membrane-bound organelles like mitochondria and the endoplasmic reticulum, whereas prokaryotic cells lack a true nucleus and membrane-bound organelles. Prokaryotic DNA is typically circular and located in the nucleoid region, while eukaryotic DNA is linear and organized into chromosomes within the nucleus.
What is central dogma?
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What are main differences between RNA and DNA?
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What is a peptide bond?
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Why protein synthesis is required in the cell.
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A diploid cell has 20 chromosomes. How many chromosomes can be expected in the daughter cell if it undergoes mitosis?
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Write the essential features of S phase of cell cycle.
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What is Autocrine function in a cell?
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What is the Role of ATP in cell signaling?
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Part B
Write about the properties of cell membrane.
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Write the essential features of cell theory.
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Write the similarities between a prokaryotic and eukaryotic cell and write their significance.
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Explain role of water in biological systems.
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Explain the role of tRNA in proteins synthesis.
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Give the general structure of DNA.
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Write the essentials steps of transcription in Eukaryotes.
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Explain the main functions played by DNA.
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Explain about Ramachandran plot in predicting protein structure.
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Write the protein structural hierarchy.
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Explain various essential cellular processes.
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Explain about operon concept with a suitable example.
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Explain how metabolism is regulated in the cell with a suitable example.
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Explain how to carry out Genomic analysis along with a note on its significance.
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Explain how gametes are formed by meiosis.
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Write the various phases of cell cycle.
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What are cellular receptors. Explain their role in cell signaling.
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Explain significance of phophosrylation by protein kinases in cell signalling.
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Explain about signal transduction.
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Write about G coupled receptors in cell signaling.
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