Question

multicellular organisms have different cell types because of gene regulation. which statements are true depictions of how human gene regulation works? check all that apply genes transcribed only in lung cells are present only in lung cell nuclei and genes transcribed in eye cells are present only in eye cell nuclei, transcribed only in lung cells are present only in lung cell nuclei and genes transcribed in eye cells are present only in eye cell nuclei, etc. some genes are transcribed only in kidneys because their enhancers are present only in kidney genes are transcribed only in kidneys because their enhancers are present only in kidney cells. the genes that encode proteins present in muscle cells but not brain cells must be transcribed in muscle cells but not brain genes that encode proteins present in muscle cells but not brain cells must be transcribed in muscle cells but not brain cells. if a gene is transcribed, and that transcript is processed the same way and also translated in all cell types, the protein the mrna encodes must be present and active in all cell a gene is transcribed, and that transcript is processed the same way and also translated in all cell types, the protein the mrna encodes must be present and active in all cell types. the enhancers of all genes exist in all cell enhancers of all genes exist in all cell types. the transcript of a gene can be spliced the same way in cells of the iris and cornea, but the protein might be active only in the iris transcript of a gene can be spliced the same way in cells of the iris and cornea, but the protein might be active only in the iris cells. a gene can be transcribed in both eyes and skin but the mrnas of that gene could encode different proteins in those two cell types: a skin-specific protein and an eye-specific protein.a gene can be transcribed in both eyes and skin but the mrnas of that gene could encode different proteins in those two cell types: a skin-specific protein and an eye-specific protein. if a protein is present only in pancreas cells, that means that the gene encoding that protein is transcribed only in the a protein is present only in pancreas cells, that means that the gene encoding that protein is transcribed only in the pancreas. if a particular gene is transcribed only in your bones, that means that the gene's enhancer is active only in bone a particular gene is transcribed only in your bones, that means that the gene's enhancer is active only in bone cells.

Answer 1

True statements:

1. Genes transcribed only in lung cells are present only in lung cell nuclei, and genes transcribed in eye cells are present only in eye cell nuclei.
2. Some genes are transcribed only in kidneys because their enhancers are present only in kidney cells.
3. The genes that encode proteins present in muscle cells but not brain cells must be transcribed in muscle cells but not brain cells.
4. If a gene is transcribed, and that transcript is processed the same way and also translated in all cell types, the protein the mRNA encodes must be present and active in all cell types.
5. The transcript of a gene can be spliced the same way in cells of the iris and cornea, but the protein might be active only in the iris cells.
6. A gene can be transcribed in both eyes and skin, but the mRNAs of that gene could encode different proteins in those two cell types: a skin-specific protein and an eye-specific protein.
7. If a protein is present only in pancreas cells, that means that the gene encoding that protein is transcribed only in the pancreas.
8. If a particular gene is transcribed only in your bones, that means that the gene's enhancer is active only in bone cells.

1. Genes transcribed only in lung cells are present only in lung cell nuclei, and genes transcribed in eye cells are present only in eye cell nuclei: This statement reflects the concept of tissue-specific gene expression, where genes are transcribed and expressed in a cell type-specific manner, leading to the presence of gene products (mRNAs) only in the nuclei of cells where they are actively transcribed.
2. Some genes are transcribed only in kidneys because their enhancers are present only in kidney cells: This statement highlights the role of enhancers, regulatory DNA sequences that control gene expression. Kidney-specific enhancers activate gene transcription exclusively in kidney cells.
3. The genes that encode proteins present in muscle cells but not brain cells must be transcribed in muscle cells but not brain cells: This statement underscores the tissue-specific nature of gene expression. Genes responsible for muscle-specific proteins are transcribed in muscle cells but not in brain cells.
4. If a gene is transcribed, and that transcript is processed the same way and also translated in all cell types, the protein the mRNA encodes must be present and active in all cell types: This statement implies that a ubiquitously expressed gene, transcribed, processed, and translated uniformly across different cell types, leads to the presence and activity of the encoded protein in all cell types.
5. The transcript of a gene can be spliced the same way in cells of the iris and cornea, but the protein might be active only in the iris cells: This statement emphasizes that post-transcriptional processes, such as alternative splicing, can result in different protein isoforms from the same gene, leading to functional differences. In this case, the protein may be active only in iris cells.
6. A gene can be transcribed in both eyes and skin, but the mRNAs of that gene could encode different proteins in those two cell types: a skin-specific protein and an eye-specific protein: This statement highlights that even if a gene is transcribed in multiple tissues, differential mRNA processing can lead to the production of distinct proteins tailored for specific cell types.
7. If a protein is present only in pancreas cells, that means that the gene encoding that protein is transcribed only in the pancreas: This statement connects the presence of a protein to tissue-specific transcription, indicating that the gene responsible for the protein is selectively transcribed in pancreas cells.
8. If a particular gene is transcribed only in your bones, that means that the gene's enhancer is active only in bone cells: This statement associates tissue-specific transcription with the activity of enhancer regions, emphasizing that the gene is only transcribed in bones due to the activation of bone-specific enhancers.