20 MUST KNOW Biology Questions I TEAS 7 Prep I ATI TEAS 7 I

This paragraph introduces a set of 20 biology-focused practice questions for the TEAS exam, developed based on student feedback. The speaker emphasizes the importance of these high-yield topics while also advising students to maintain a broad understanding of biology as required by ATI. The first question is about matching descriptions of mitosis stages with illustrations, and the speaker provides a hint to distinguish between the stages based on the appearance of chromatin and chromosomes.

The speaker continues with a discussion on codons, explaining their role in protein synthesis and differentiating between start and stop codons. A bonus question about the dependent variable in an experiment is introduced, highlighting the importance of understanding the relationship between independent and dependent variables in scientific experiments.

This section delves into the specifics of nucleotide base pairing in DNA and RNA, correcting a common misconception about RNA containing uracil instead of thymine. The speaker also touches on the concepts of phenotype and genotype, explaining their relationship and importance in genetics.

The paragraph discusses how to use Punnett squares to predict genetic outcomes, specifically using the example of pea plant seed color. It explains the concept of dominance and how heterozygous plants can produce offspring with a predictable ratio of phenotypes, in this case, predicting 75% green seeds.

The speaker explores the relationship between macromolecules and their monomer building blocks, such as monosaccharides for carbohydrates, fatty acids and glycerol for lipids, amino acids for proteins, and nucleotides for nucleic acids. A bonus question about the hydrophilic and hydrophobic parts of the phospholipid bilayer is also included.

This paragraph covers the basics of human chromosome inheritance, explaining that humans have 46 chromosomes, with 23 inherited from each parent. It also addresses common misconceptions about chromosomes and sister chromatids, emphasizing the uniqueness of each chromosome in a homologous pair.

The speaker differentiates between eukaryotic and prokaryotic cells, identifying plants, fungi, and animals as eukaryotic, while archaea, bacteria, and cyanobacteria are classified as prokaryotic. A bonus question about the presence or absence of a nucleus in these cells is also discussed.

The paragraph highlights the important properties of water that are relevant to both biology and chemistry, such as its role as a universal solvent, its cohesive and adhesive nature, polarity, and the formation of hydrogen bonds, which contribute to its high boiling point.

The speaker explains the phases of the cell cycle, focusing on the S phase where DNA replication occurs. The importance of this phase in preparing the cell for division is emphasized, as it ensures each daughter cell receives a complete set of genetic material.

This section contrasts mitosis and meiosis, detailing the outcomes of each process. Mitosis results in two identical diploid daughter cells, while meiosis produces four genetically unique haploid gametes. The significance of these processes in the formation of somatic and sex cells is discussed.

The final paragraph discusses the concept of genetic diversity, focusing on the role of crossing over and recombination during meiosis. It explains how these processes contribute to the variation in gametes, enhancing a species' ability to adapt and survive. A bonus question invites students to reflect on the importance of genetic diversity.