Biology EOC Comprehensive Review

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What is an X-linked recessive trait?

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An X-linked recessive trait is a genetic condition that is associated with a gene located on the X chromosome. Males (XY) are more likely to express the trait because they have only one X chromosome, while females (XX) can be carriers if they have one affected X chromosome.

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What is the role of vascular tissue in plants?

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Vascular tissue is responsible for the transport of water, nutrients, and food throughout the plant. It consists of xylem (which transports water) and phloem (which transports sugars and other metabolic products).

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How does mRNA carry genetic information?

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mRNA (messenger RNA) carries genetic information from DNA to the ribosome, where it serves as a template for protein synthesis. The sequence of nitrogen bases on the mRNA determines the order of amino acids in a protein.

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What is cell differentiation?

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Cell differentiation is the process by which a less specialized cell becomes a more specialized cell type. During this process, different genes are activated or deactivated, leading to distinct structures and functions.

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What determines the function of a specialized cell?

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The function of a specialized cell is determined by the active genes in the cell, which dictate the proteins produced and the cell's specific role in the organism.

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What is the significance of stomata in plants?

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Stomata are small openings on the surfaces of leaves that allow for gas exchange. They enable the uptake of carbon dioxide for photosynthesis and the release of oxygen.

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What is the difference between ferns and mosses?

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Ferns have vascular tissue, which allows them to transport water and nutrients efficiently, while mosses do not have vascular tissue and rely on diffusion for nutrient transport.

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What is the function of tRNA in protein synthesis?

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tRNA (transfer RNA) carries amino acids to the ribosome during protein synthesis. Each tRNA molecule has an anticodon that pairs with the corresponding codon on the mRNA.

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What is the role of ribosomes in cells?

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Ribosomes are the cellular structures where protein synthesis occurs. They read the sequence of mRNA and translate it into a polypeptide chain by linking amino acids together.

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What is a mutation?

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A mutation is a change in the DNA sequence of a gene. Mutations can lead to changes in protein structure and function, potentially resulting in genetic disorders or variations.