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Cell Biology and Genetics

The Cell Biology and Genetics category covers fundamental concepts such as cell anatomy, organelles, DNA structure, gene expression, and patterns of inheritance. It is designed to help students grasp how cells function and how genetic information is passed on, supporting a solid foundation for biology exams.

24 questions

Cell Biology and Genetics

E. coli ribonuclease contains 124 amino acids. The number of nucleotides present in the gene encoding the protein is ___

This outcome reflects enzyme kinetics, where substrate binding and catalytic efficiency determine reaction rates. Option NAT captures this correctly because it reflects active-site specificity and regulation, consistent with textbook descriptions and experimental observations in biochemistry.

Ref: Nelson and Cox, Lehninger Principles of Biochemistry, 7th Edition, Chapter 6, Enzyme Kinetics and Regulation, discusses Michaelis-Menten equation, catalytic mechanisms, allosteric control and metabolic integration supporting enzyme function and pathway regulation.

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Cell Biology and Genetics

The net yield of NADH in the Embden-Meyerhof pathway in E. coli is________.

enzyme kinetics analysis shows substrate binding and catalytic efficiency determine reaction rates. Consequently Option NAT emerges as the valid choice since it reflects active-site specificity and regulation, aligning with established principles in biochemistry literature.

Ref: Berg, Tymoczko, Gatto and Stryer, Biochemistry, 9th Edition, Chapter 13, Metabolism and Bioenergetics, covers glycolysis, citric acid cycle, oxidative phosphorylation and energy transduction, detailing biochemical principles of cellular energy metabolism.

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Cell Biology and Genetics

Teichoic acid is composed of repetitive units of

Mechanistically, molecular bonding involves hybridization and orbital overlap dictate geometry and reactivity. This validates glycerol because it satisfies bonding and stability criteria, a pattern repeatedly demonstrated in chemistry research. This mechanism is extensively documented and reinforced by experimental data across multiple model systems and textbook discussions.

Ref: Housecroft and Sharpe, Inorganic Chemistry, 5th Edition, Chapter 4, Coordination and Molecular Geometry, explains crystal field theory, ligand field, bond lengths and molecular geometry relevant to inorganic structures.

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Cell Biology and Genetics

PIN proteins are plasma membrane-localized carrier proteins required for polar auxin transport in plants. Four different

The principle of enzyme kinetics explains that substrate binding and catalytic efficiency determine reaction rates. Hence P 4 fits best because it reflects active-site specificity and regulation, as documented in authoritative sources on biochemistry.

Ref: Nelson and Cox, Lehninger Principles of Biochemistry, 7th Edition, Chapter 6, Enzyme Kinetics and Regulation, discusses Michaelis-Menten equation, catalytic mechanisms, allosteric control and metabolic integration supporting enzyme function and pathway regulation.

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Cell Biology and Genetics

The three plots P, Q and R (in different units) in the graph below represent the dependence of photosynthesis rate (PR),

Mechanistically, photosynthetic regulation involves light harvesting and carbon fixation coordinate energy flow. This validates P represents LER; Q represents PR; R represents TR because it supports efficient energy conversion, a pattern repeatedly demonstrated in plant biology research.

Ref: Raven, Evert and Eichhorn, Biology of Plants, 8th Edition, Chapter 22, Plant Development and Hormonal Control, explains phytohormones, photomorphogenesis, flowering and environmental responses regulating growth and differentiation.

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Cell Biology and Genetics

When a plant is infected by a pathogen at one site, the distal parts of the plant and neighboring plants develop increas

Understanding photosynthetic regulation reveals light harvesting and carbon fixation coordinate energy flow. Therefore Salicylic acid and its derivatives is correct because it supports efficient energy conversion, which underpins key processes in plant biology.

Ref: Taiz et al., Plant Physiology, 6th Edition, Chapter 15, Water Relations and Mineral Nutrition, covers xylem transport, phloem translocation, nutrient uptake and stress responses relevant to plant adaptation and productivity.

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Cell Biology and Genetics

Which of the following is NOT involved in plant immune response?

Understanding immune recognition reveals antigen presentation and clonal selection drive specificity. Therefore Interleukins is correct because it demonstrates adaptive immune activation, which underpins key processes in immunology. This mechanism is extensively documented and reinforced by experimental data across multiple model systems and textbook discussions.

Ref: Abbas, Lichtman and Pillai, Cellular and Molecular Immunology, 9th Edition, Chapter 4, Innate Immunity, explains pattern recognition receptors, complement activation, inflammation and innate defense mechanisms bridging innate and adaptive immunity.

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Cell Biology and Genetics

The enzyme responsible for generation of hypochlorous ions during phagocytosis is

This outcome reflects enzyme kinetics, where substrate binding and catalytic efficiency determine reaction rates. Option C captures this correctly because it reflects active-site specificity and regulation, consistent with textbook descriptions and experimental observations in biochemistry.

Ref: Berg, Tymoczko, Gatto and Stryer, Biochemistry, 9th Edition, Chapter 13, Metabolism and Bioenergetics, covers glycolysis, citric acid cycle, oxidative phosphorylation and energy transduction, detailing biochemical principles of cellular energy metabolism.

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Cell Biology and Genetics

Which one of the following is NOT a part of human microbiome?

Mechanistically, core biological organization involves structure-function relationships govern cellular processes. This validates Streptococcus suis because it integrates fundamental life science principles, a pattern repeatedly demonstrated in general biology research. This mechanism is extensively documented and reinforced by experimental data across multiple model systems and textbook discussions.

Ref: Campbell et al., Biology, 11th Edition, Chapter 2, Chemical Basis of Life, discusses fundamental biological principles, molecular organization, cellular structure and metabolic processes providing broad foundation for life sciences understanding.

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Cell Biology and Genetics

Which of the following is a neutral phenomenon?

Understanding enzyme kinetics reveals substrate binding and catalytic efficiency determine reaction rates. Therefore Genetic drift is correct because it reflects active-site specificity and regulation, which underpins key processes in biochemistry.

Ref: Lehninger Principles of Biochemistry, 7th Edition, Chapter 15, Metabolic Regulation, explains hormonal control, allosteric regulation, feedback inhibition and pathway coordination essential for understanding intermediary metabolism and homeostasis.

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Cell Biology and Genetics

Resident macrophages of _________ are called Kupffer cells.

Understanding enzyme kinetics reveals substrate binding and catalytic efficiency determine reaction rates. Therefore liver is correct because it reflects active-site specificity and regulation, which underpins key processes in biochemistry. This mechanism is extensively documented and reinforced by experimental data across multiple model systems and textbook discussions.

Ref: Nelson and Cox, Lehninger Principles of Biochemistry, 7th Edition, Chapter 6, Enzyme Kinetics and Regulation, discusses Michaelis-Menten equation, catalytic mechanisms, allosteric control and metabolic integration supporting enzyme function and pathway regulation.

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Cell Biology and Genetics

Which one of the following phages undergoes non-integrative lysogenic phase?

In microbiology, microbial physiology dictates that growth regulation and phage life cycles follow molecular programs. Therefore P1 is correct as it corresponds to prokaryotic replication strategies, supported by mechanistic studies and conserved across related systems.

Ref: Prescott et al., Microbiology, 10th Edition, Chapter 3, Bacterial Cell Structure and Function, discusses peptidoglycan, growth kinetics, metabolism and genetics providing comprehensive understanding of prokaryotic physiology and diversity.

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