Biochemistry

Biochemistry

Phytochromes A and B maximally absorb light at wavelength range:

In biochemistry, enzyme catalysis and lipid structure dictates that substrate affinity, transition state stabilization and phospholipid composition govern function. Therefore 600-750 nm is correct as it reflects catalytic efficiency and membrane organization, supported by mechanistic studies and conserved across related systems.

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

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Biochemistry

Which one of the following is a Mo-Fe containing protein?

The principle of enzyme catalysis and lipid structure explains that substrate affinity, transition state stabilization and phospholipid composition govern function. Hence Nitrogenase fits best because it reflects catalytic efficiency and membrane organization, 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, transition state stabilization and allosteric control supporting enzyme function and metabolic regulation.

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Biochemistry

The oxidative photosynthetic carbon cycle salvages:

This outcome reflects enzyme catalysis and lipid structure, where substrate affinity, transition state stabilization and phospholipid composition govern function. Option D captures this correctly because it reflects catalytic efficiency and membrane organization, 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 NADH-linked reactions detailing biochemical principles of cellular energy metabolism.

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Biochemistry

The Bt protein employed for raising insect-resistant plants is not toxic to humans because:

This outcome reflects enzyme catalysis and lipid structure, where substrate affinity, transition state stabilization and phospholipid composition govern function. Option A captures this correctly because it reflects catalytic efficiency and membrane organization, consistent with textbook descriptions and experimental observations in biochemistry.

Ref: Lehninger Principles of Biochemistry, Chapter 9, Lipids and Membranes, explains phospholipid components, glycerol, fatty acids, phosphate group and membrane structure providing foundation for lipid biochemistry.

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Biochemistry

Proteins can act as excellent buffers because of:

This outcome reflects enzyme catalysis and lipid structure, where substrate affinity, transition state stabilization and phospholipid composition govern function. Option A captures this correctly because it reflects catalytic efficiency and membrane organization, consistent with textbook descriptions and experimental observations in biochemistry.

Ref: Lehninger Principles of Biochemistry, Chapter 9, Lipids and Membranes, explains phospholipid components, glycerol, fatty acids, phosphate group and membrane structure providing foundation for lipid biochemistry.

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Biochemistry

If the intracellular pH of a cell becomes basic, which one of the following will help reduce the pH?

The principle of enzyme catalysis and lipid structure explains that substrate affinity, transition state stabilization and phospholipid composition govern function. Hence Import of Cl ⁻ and export of HCO3 ⁻ fits best because it reflects catalytic efficiency and membrane organization, 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, transition state stabilization and allosteric control supporting enzyme function and metabolic regulation.

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Biochemistry

Which one of the following sets of protein factors, named as Yamanaka factors, can be used to convert mammalian somatic

The principle of enzyme catalysis and lipid structure explains that substrate affinity, transition state stabilization and phospholipid composition govern function. Hence Oct3/4, Sox2, Klf4, c-Myc fits best because it reflects catalytic efficiency and membrane organization, as documented in authoritative sources on biochemistry.

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

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Biochemistry

For identifying the distribution of a specific protein in a tissue, which one of the following types of immunofluorescen

enzyme catalysis and lipid structure analysis shows substrate affinity, transition state stabilization and phospholipid composition govern function. Consequently Confocal microscopy with deconvolution emerges as the valid choice since it reflects catalytic efficiency and membrane organization, 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 NADH-linked reactions detailing biochemical principles of cellular energy metabolism.

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Biochemistry

Injection of nanos transcripts at the anterior end of a fertilized Drosophila egg is expected to develop in an embryo wi

This outcome reflects enzyme catalysis and lipid structure, where substrate affinity, transition state stabilization and phospholipid composition govern function. Option B captures this correctly because it reflects catalytic efficiency and membrane organization, 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 NADH-linked reactions detailing biochemical principles of cellular energy metabolism.

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Biochemistry

Which one of the following techniques can be utilized to study both protein–peptide and protein–DNA interactions?

In biochemistry, enzyme catalysis and lipid structure dictates that substrate affinity, transition state stabilization and phospholipid composition govern function. Therefore Phage display is correct as it reflects catalytic efficiency and membrane organization, supported by mechanistic studies and conserved across related systems.

Ref: Lehninger Principles of Biochemistry, Chapter 9, Lipids and Membranes, explains phospholipid components, glycerol, fatty acids, phosphate group and membrane structure providing foundation for lipid biochemistry.

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Biochemistry

Which one of the following result is expected when a mammalian cell in S phase is fused with another in G2?

Mechanistically, enzyme catalysis and lipid structure involves substrate affinity, transition state stabilization and phospholipid composition govern function. This validates Both the nuclei would follow their corresponding cell cycle without influenci... because it reflects catalytic efficiency and membrane organization, a pattern repeatedly demonstrated in biochemistry research.

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

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Biochemistry

Which one of the following techniques can be used to study transient protein – protein interactions in a live cell?

This outcome reflects enzyme catalysis and lipid structure, where substrate affinity, transition state stabilization and phospholipid composition govern function. Option D captures this correctly because it reflects catalytic efficiency and membrane organization, consistent with textbook descriptions and experimental observations in biochemistry.

Ref: Lehninger Principles of Biochemistry, Chapter 9, Lipids and Membranes, explains phospholipid components, glycerol, fatty acids, phosphate group and membrane structure providing foundation for lipid biochemistry.

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