Podcast
Questions and Answers
Which characteristic is NOT universally considered a defining trait of life?
Which characteristic is NOT universally considered a defining trait of life?
- The ability to acquire and use energy
- Maintaining a constant internal temperature (correct)
- Reproduction through DNA
- Responding to environmental stimuli
A scientist conducts an experiment without including a control group. Why might the results be considered unreliable?
A scientist conducts an experiment without including a control group. Why might the results be considered unreliable?
- The experiment was not peer-reviewed before commencement.
- The hypothesis was not falsifiable
- The sample size is likely too small to draw meaningful conclusions
- There is no basis for determining if the experimental treatment had an actual effect (correct)
Which of the following represents the correct way to write the scientific name of humans?
Which of the following represents the correct way to write the scientific name of humans?
- *Homo Sapien*
- *Homo sapiens* (correct)
- homo sapien
- _Homo sapiens_
An atom has 6 protons, 8 neutrons, and 6 electrons. What is its atomic number and mass number, respectively?
An atom has 6 protons, 8 neutrons, and 6 electrons. What is its atomic number and mass number, respectively?
Which type of chemical bond is primarily responsible for the surface tension of water?
Which type of chemical bond is primarily responsible for the surface tension of water?
A solution has a pH of 3. Which statement accurately describes the solution?
A solution has a pH of 3. Which statement accurately describes the solution?
Which functional group is commonly found in alcohols?
Which functional group is commonly found in alcohols?
Two molecules have the same molecular formula but different structural arrangements. What are they called?
Two molecules have the same molecular formula but different structural arrangements. What are they called?
Which of the following is a primary function of polysaccharides like starch and glycogen?
Which of the following is a primary function of polysaccharides like starch and glycogen?
What is the role of an enzyme in a chemical reaction?
What is the role of an enzyme in a chemical reaction?
Flashcards
Age of the Earth
Age of the Earth
Earth is approximately 4.6 billion years old, based on radiometric dating of meteorites and lunar rocks.
Characteristics of Life
Characteristics of Life
Life is characterized by organization, metabolism, responsiveness, growth, development, reproduction, and adaptation.
Peer Review vs. Junk Science
Peer Review vs. Junk Science
Peer review involves evaluation by experts; junk science lacks rigorous testing and validation.
Taxonomy & Scientific Names
Taxonomy & Scientific Names
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Prokaryotic vs. Eukaryotic Cells
Prokaryotic vs. Eukaryotic Cells
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Matter, Elements, and Atoms
Matter, Elements, and Atoms
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Chemical Bonds
Chemical Bonds
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Polar vs. Nonpolar Molecules
Polar vs. Nonpolar Molecules
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Cohesion & Adhesion
Cohesion & Adhesion
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Water’s High Specific Heat & Density
Water’s High Specific Heat & Density
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Study Notes
- Exam will cover: Introduction to Biology, Chemistry of Life, Water and pH, Carbon & Macromolecules, and Macromolecules.
Chapter 1 - Introduction to Biology
- The Earth is 4.6 billion years old.
- Life characteristics will be covered.
- Peer review is different than junk science.
- Taxonomy and scientific names are key topics.
- Prokaryotic cells will be compared to eukaryotic cells.
Chapter 2 - Chemistry of Life
- Matter, elements, and atoms are foundational.
- Protons, neutrons, and electrons are subatomic particles.
- Atomic number and isotopes differentiate elements.
- Chemical bonds include covalent, ionic, and hydrogen bonds.
- Molecules can be polar or nonpolar.
Chapter 3 - Water and pH
- Cohesion and adhesion properties of water are important.
- Water has high specific heat and density.
- Solvent properties of water will be addressed.
- The pH scale defines acids, bases, and buffers.
Chapter 4 - Carbon & Macromolecules
- Carbon's role in organic molecules is central.
- Functional groups include hydroxyl and carboxyl.
- Isomers share formulas but differ in structure.
Chapter 5 - Macromolecules
- Carbohydrates include monosaccharides, starch, and glycogen.
- Lipids include fats, phospholipids, and steroids.
- Proteins consist of amino acids, structure, and enzymes.
- Nucleic acids: DNA vs. RNA, plus their structure.
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Description
Covers the earth's age, life characteristics, taxonomy, cell types, basic chemistry, water properties, and pH scales, the role of carbon, and the basics of macromolecules.
