Please answer the following questions only if you know it.
Thank you.
Solution
Answer:
2. (B) Different cells express different set of genes.
Cell differentiation generally depends on changes in gene expression rather than on any changes
in the nucleotide sequence of the cell\'s genome.
3. (A) The type of cell adhesion molecules and cellular junctions.
A fundamental feature of complex multicellular organisms is the molecular adhesion that
governs formation of a distinctive and reproducible multicellular morphology. In animals, cell
adhesion is mediated by a battery of proteins, including those that give rise to epithelia. Plants, in
contrast, use pectins and, perhaps, hemicelluloses to mediate cell-cell adhesion.
Complex multicellular organisms show not only evidence of cell-cell adhesion but also
intercellular communication and, commonly, tissue differentiation mediated by networks of
regulatory genes.
4. (A) Simple diffusion
Oxygen and carbon dioxide are both small, nonpolar molecules that are able to pass through the
lipid bilayers of the membrane through the simple diffusion process because the plasma
membrane of the capillaries are permeable to these substances..
Please answer the following questions only if you know it.Than.pdf
1. Please answer the following questions only if you know it.
Thank you.
Solution
Answer:
2. (B) Different cells express different set of genes.
Cell differentiation generally depends on changes in gene expression rather than on any changes
in the nucleotide sequence of the cell's genome.
3. (A) The type of cell adhesion molecules and cellular junctions.
A fundamental feature of complex multicellular organisms is the molecular adhesion that
governs formation of a distinctive and reproducible multicellular morphology. In animals, cell
adhesion is mediated by a battery of proteins, including those that give rise to epithelia. Plants, in
contrast, use pectins and, perhaps, hemicelluloses to mediate cell-cell adhesion.
Complex multicellular organisms show not only evidence of cell-cell adhesion but also
intercellular communication and, commonly, tissue differentiation mediated by networks of
regulatory genes.
4. (A) Simple diffusion
Oxygen and carbon dioxide are both small, nonpolar molecules that are able to pass through the
lipid bilayers of the membrane through the simple diffusion process because the plasma
membrane of the capillaries are permeable to these substances.
