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Cell Biology and Genetics

This category gathers questions that test knowledge of cell biology and genetics. Topics include cell components, DNA structure, gene expression, inheritance patterns, and related biological processes.

26 questions

Cell Biology and Genetics

A variety “X” is a donor for resistance to blast, but it has an undesirable gene for lodging susceptibility that is tigh

This outcome reflects metabolic engineering and inheritance, where exogenous gene introduction and pathway extension enable trait improvement. Option D captures this correctly because it demonstrates metabolic extension and combinatorial biosynthesis, consistent with textbook descriptions and experimental observations in genetics and biotechnology.

Ref: Pierce, Genetics: A Conceptual Approach, 6th Edition, Chapter 3, Mendelian Inheritance, discusses genotype-phenotype correlation and inheritance patterns providing framework for genetic transmission and metabolic engineering principles.

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Cell Biology and Genetics

Assume gene “A” is dominant over “a” and “B1” is codominant over “B2” in petunia. A cross is made between two individual

metabolic engineering and inheritance analysis shows exogenous gene introduction and pathway extension enable trait improvement. Consequently 1:2:1 emerges as the valid choice since it demonstrates metabolic extension and combinatorial biosynthesis, aligning with established principles in genetics and biotechnology literature.

Ref: Pierce, Genetics: A Conceptual Approach, 6th Edition, Chapter 3, Mendelian Inheritance, discusses genotype-phenotype correlation and inheritance patterns providing framework for genetic transmission and metabolic engineering principles.

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Cell Biology and Genetics

Assume that a marker M1 is present 5 cM away on one side of a gene “X” (a desirable allele of the gene), while marker M2

In genetics and biotechnology, metabolic engineering and inheritance dictates that exogenous gene introduction and pathway extension enable trait improvement. Therefore 0 is correct as it demonstrates metabolic extension and combinatorial biosynthesis, supported by mechanistic studies and conserved across related systems.

Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production and nutritional improvement.

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Cell Biology and Genetics

In an ordered tetrad analysis, if the two genes are not linked, the ………… will be almost equal.

metabolic engineering and inheritance analysis shows exogenous gene introduction and pathway extension enable trait improvement. Consequently Parental ditype and non-parental ditype emerges as the valid choice since it demonstrates metabolic extension and combinatorial biosynthesis, aligning with established principles in genetics and biotechnology literature.

Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production and nutritional improvement.

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Cell Biology and Genetics

‘Gene for gene’ hypothesis states that:

This outcome reflects metabolic engineering and inheritance, where exogenous gene introduction and pathway extension enable trait improvement. Option B captures this correctly because it demonstrates metabolic extension and combinatorial biosynthesis, consistent with textbook descriptions and experimental observations in genetics and biotechnology.

Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production and nutritional improvement.

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Cell Biology and Genetics

Linkage disequilibrium (LD) decay is:

This outcome reflects metabolic engineering and inheritance, where exogenous gene introduction and pathway extension enable trait improvement. Option A captures this correctly because it demonstrates metabolic extension and combinatorial biosynthesis, consistent with textbook descriptions and experimental observations in genetics and biotechnology.

Ref: Hartl and Jones, Genetics: Analysis of Genes and Genomes, 8th Edition, Chapter 7, Mutation and DNA Repair, covers mutation types, DNA repair pathways and genome stability relevant to genetic engineering.

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Cell Biology and Genetics

In a given population, 1 out of 400 individuals has cancer caused by a recessive allele ‘p’. Assuming the population is

In genetics and biotechnology, metabolic engineering and inheritance dictates that exogenous gene introduction and pathway extension enable trait improvement. Therefore 38/400 is correct as it demonstrates metabolic extension and combinatorial biosynthesis, supported by mechanistic studies and conserved across related systems.

Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production and nutritional improvement.

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Cell Biology and Genetics

Gynogenesis in fishes is achieved by:

This outcome reflects metabolic engineering and inheritance, where exogenous gene introduction and pathway extension enable trait improvement. Option C captures this correctly because it demonstrates metabolic extension and combinatorial biosynthesis, consistent with textbook descriptions and experimental observations in genetics and biotechnology.

Ref: Hartl and Jones, Genetics: Analysis of Genes and Genomes, 8th Edition, Chapter 7, Mutation and DNA Repair, covers mutation types, DNA repair pathways and genome stability relevant to genetic engineering.

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Cell Biology and Genetics

For some people it is a popular herb added in food for flavour, but for others it tastes like soap due to a mutation in

Mechanistically, metabolic engineering and inheritance involves exogenous gene introduction and pathway extension enable trait improvement. This validates Cilantro because it demonstrates metabolic extension and combinatorial biosynthesis, a pattern repeatedly demonstrated in genetics and biotechnology research.

Ref: Hartl and Jones, Genetics: Analysis of Genes and Genomes, 8th Edition, Chapter 7, Mutation and DNA Repair, covers mutation types, DNA repair pathways and genome stability relevant to genetic engineering.

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Cell Biology and Genetics

In mammalian cell culture based monoclonal antibody production, perfusion culture is preferred over continuous stirred t

In cell biology, cellular compartmentalization and cell cycle dictates that SNARE-mediated trafficking, Hayflick limit, P53 and cyclin regulation control proliferation. Therefore high volumetric productivity is correct as it aligns with membrane trafficking and cell cycle control, supported by mechanistic studies and conserved across related systems.

Ref: Alberts et al., Molecular Biology of the Cell, 6th Edition, Chapter 10, Membrane Structure and Transport, discusses SNARE proteins, vesicle trafficking, ER, Golgi, endosome membranes and selective transport providing compartmentalization foundation.

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Cell Biology and Genetics

Two cell lines (Vero and SP2/O-Ag14) were cross contaminated. In order to confirm the homogeneity of the cell lines, whi

This outcome reflects cellular compartmentalization and cell cycle, where SNARE-mediated trafficking, Hayflick limit, P53 and cyclin regulation control proliferation. Option B captures this correctly because it aligns with membrane trafficking and cell cycle control, consistent with textbook descriptions and experimental observations in cell biology.

Ref: Alberts et al., Molecular Biology of the Cell, 6th Edition, Chapter 17, Cell Cycle and Regulation, explains Cdc2, cyclins, P53, proteasomes, Hayflick limit, primary culture and immortalization mechanisms governing proliferation and genomic stability.

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Cell Biology and Genetics

SCID mice lack T-cells owing to the:

In cell biology, cellular compartmentalization and cell cycle dictates that SNARE-mediated trafficking, Hayflick limit, P53 and cyclin regulation control proliferation. Therefore Defect in recombinase genes is correct as it aligns with membrane trafficking and cell cycle control, supported by mechanistic studies and conserved across related systems.

Ref: Alberts et al., Molecular Biology of the Cell, 6th Edition, Chapter 17, Cell Cycle and Regulation, explains Cdc2, cyclins, P53, proteasomes, Hayflick limit, primary culture and immortalization mechanisms governing proliferation and genomic stability.

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