Question

what are the two main steps of gene expression and where do they occur?
your answer

what does gene expression mean?
your answer

the process of building a protein from mrna is called
your answer

describe one way gene expression can be influenced by the environment.
your answer

Explanation:

• First question: Gene expression has two main steps. Transcription occurs in the nucleus where DNA is copied to mRNA. Translation happens in the cytoplasm (on ribosomes) where mRNA is used to make proteins.
• Second question: Gene expression is the process by which information from a gene (DNA) is used to create a functional gene product like a protein. It involves transcription and translation.
• Third question: The process of building a protein from mRNA is called translation. Ribosomes read the mRNA codons and assemble amino acids (carried by tRNA) into a polypeptide chain (protein).
• Fourth question: One way the environment can influence gene expression is through temperature. For example, in some reptiles, temperature during egg incubation can determine the sex of the offspring by influencing gene expression related to sex - determining genes.

Answer:

• First question: Transcription (in the nucleus) and translation (in the cytoplasm/on ribosomes).
• Second question: The process of using information from a gene (DNA) to create a functional gene product (e.g., a protein), involving transcription and translation.
• Third question: Translation.
• Fourth question: Temperature can influence gene expression (e.g., in some reptiles for sex - determination).