Biology STAAR Review

Front

What is gene flow?

Back

Gene flow is the transfer of genetic material (alleles) between populations, which can introduce new alleles into a population, increasing genetic diversity.

Front

What classification group do blue whales and narwhals share?

Back

Both blue whales and narwhals belong to the Phylum Chordata, which includes all animals with a notochord.

Front

How do environmental factors activate genes in a cell?

Back

Environmental factors activate genes by causing the cell to transcribe specific DNA segments into mRNA, which is then translated into proteins.

Front

What is the primary function of proteins in a cell?

Back

Proteins catalyze chemical reactions inside the cell, acting as enzymes to facilitate metabolic processes.

Front

What determines the amino acid sequence of a protein like albumin?

Back

The amino acid sequence of a protein is determined by the sequence of nucleotides in the DNA that codes for that protein.

Front

What is the role of lipids in a cell?

Back

Lipids allow for the transport of certain molecules into and out of the cell and serve as structural components of cell membranes.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis produces two identical daughter cells for growth and repair, while meiosis produces four haploid gametes for sexual reproduction.

Front

What is the significance of the sequence of nucleotides in DNA?

Back

The sequence of nucleotides in DNA encodes the genetic information that determines the traits of an organism and the proteins it produces.

Front

How do proteins and lipids differ in their functions?

Back

Proteins primarily catalyze reactions and perform cellular functions, while lipids mainly provide structural support and energy storage.

Front

What is cross-pollination?

Back

Cross-pollination is the transfer of pollen from one flower to another flower of the same species, leading to genetic variation.