Biology Midterm Study Guide

Fast Overview

Welcome to your comprehensive Biology Midterm Study Guide. This material is designed to help you review core concepts efficiently before the exam, covering everything from cellular energy pathways and cell division to genetics and molecular biology.

Study Guide Modules

1. 1Cellular RespirationCovers glycolysis, the Krebs cycle, and the electron transport chain, breaking down how cells generate ATP from glucose.
2. 2PhotosynthesisReviews light-dependent reactions and the Calvin cycle, explaining how plants convert solar energy into chemical energy.
3. 3Mitosis vs. MeiosisCompares somatic cell division producing identical diploid cells with germline division producing diverse haploid gametes.
4. 4Mendelian GeneticsExplores inheritance patterns, Punnett squares, dominant and recessive alleles, and probabilities of traits.
5. 5DNA ReplicationDetails the enzymes involved like helicase and DNA polymerase, leading and lagging strands, and semi-conservative replication.

Key Terms to Know

1. 1ATP SynthaseAn enzyme that creates the storage form of energy (ATP) from ADP and inorganic phosphate using a proton gradient.
2. 2Crossing OverThe exchange of genetic material between homologous chromosomes during prophase I of meiosis, creating genetic diversity.
3. 3Okazaki FragmentsShort segments of DNA synthesized discontinuously on the lagging strand during DNA replication.
4. 4Phenotype vs. GenotypePhenotype is the observable physical trait; genotype is the underlying genetic makeup of an organism.

Essential Comparisons

Practice Questions

1. 1Question 1What is the net gain of ATP molecules produced directly from one molecule of glucose during cellular respiration? (Hint: consider glycolysis, Krebs, and ETC).
2. 2Question 2If a diploid organism has 24 chromosomes in its somatic cells, how many chromosomes will be present in its gametes after meiosis?
3. 3Question 3Explain why DNA replication is described as semi-conservative.

Common Mistakes to Avoid

1. 1Confusing Haploid and DiploidRemember that gametes are haploid (n) while body cells are diploid (2n).
2. 2Forgetting Water in PhotosynthesisWater is split during light-dependent reactions to provide electrons and release oxygen, not carbon dioxide.
3. 3Directionality of DNADNA polymerase only adds nucleotides to the 3' end, which explains the lagging strand complexity.

Final Review Checklist

1. 1Step 1Review lecture slides and chapter summaries for all listed topics.
2. 2Step 2Solve practice Punnett squares and pedigree charts.
3. 3Step 3Draw out cellular respiration and photosynthesis pathways from memory.
4. 4Step 4Attend the Sunday study group session at Perry-Castañeda Library with your questions.