Biology Chapter 2 Quiz
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Questions and Answers

Which of the following are considered the four most common elements in living organisms? (Select all that apply)

  • Oxygen (correct)
  • Sodium
  • Hydrogen (correct)
  • Carbon (correct)

Subatomic particles located inside the atomic nucleus include protons and electrons.

False (B)

What is the atomic number of an atom with 2 protons?

2

A molecule that has a positive and negative end due to unequal sharing of electrons is called a ______.

<p>polar covalent</p> Signup and view all the answers

What type of chemical bond involves the sharing of electrons?

<p>Covalent (B)</p> Signup and view all the answers

What is the overall charge of an atom that has an equal number of protons and electrons?

<p>Neutral (C)</p> Signup and view all the answers

What defines a cation?

<p>A positively charged atom.</p> Signup and view all the answers

Match the following types of chemical bonds with their descriptions:

<p>Covalent = Involves sharing of electrons Ionic = Involves transfer of electrons Hydrogen = Weak attraction between molecules</p> Signup and view all the answers

Nucleotides contain lipids.

<p>False (B)</p> Signup and view all the answers

What is the monomer unit for a carbohydrate?

<p>Monosaccharide (C)</p> Signup and view all the answers

The main function of carbohydrates is __________.

<p>short-term energy storage</p> Signup and view all the answers

Which objective lens provides the widest viewing angle?

<p>Scanning (A)</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Eukaryotic = Cells that contain a nucleus Prokaryotic = Cells that lack a membrane-bound organelle Amino acid = Monomer unit for proteins Nucleotide = Monomer unit for nucleic acids</p> Signup and view all the answers

The function of chloroplasts is to carry out cell respiration.

<p>False (B)</p> Signup and view all the answers

What is the main function of proteins?

<p>Building structures (C)</p> Signup and view all the answers

Using covalent bonds, carbon can bond with up to how many other atoms?

<p>4</p> Signup and view all the answers

What are the three parts of the cell theory?

<p>The cell is the basic unit of organization of organisms, all organisms are composed of cells, all cells come from preexisting cells.</p> Signup and view all the answers

The plasma membrane is ____________, allowing some substances to enter or leave a cell more easily than others.

<p>selectively permeable</p> Signup and view all the answers

Plant cells are prokaryotic.

<p>False (B)</p> Signup and view all the answers

The Golgi apparatus is responsible for:

<p>Packaging and preparation of proteins before export (B)</p> Signup and view all the answers

Which organelle is involved in degrading and recycling cellular waste?

<p>Lysosomes (B)</p> Signup and view all the answers

Cells placed in a hypotonic solution will begin to swell.

<p>True (A)</p> Signup and view all the answers

Match the organelles with their correct functions:

<p>Mitochondria = Cell respiration Chloroplasts = Photosynthesis Lysosomes = Digest worn-out organelles Peroxisomes = Detoxification</p> Signup and view all the answers

The heads of phospholipids in the plasma membrane are ___________ and face ___________ the aqueous solution.

<p>hydrophilic; toward</p> Signup and view all the answers

The concentration of dissolved substances in a solution that is less than that of the cell is called what?

<p>Hypotonic (D)</p> Signup and view all the answers

What is the process by which a cell takes in material by forming a vacuole around it?

<p>endocytosis</p> Signup and view all the answers

Osmosis is the diffusion of ______.

<p>water</p> Signup and view all the answers

Which type of transport requires energy to move particles from an area of lower concentration to an area of higher concentration?

<p>Active transport (C)</p> Signup and view all the answers

The Calvin Cycle can function without carbon dioxide.

<p>False (B)</p> Signup and view all the answers

Cells specialized in photosynthesis are known as ______.

<p>mesophyll</p> Signup and view all the answers

What is the name of the liquid portion of a chloroplast involved in photosynthesis?

<p>stroma (A)</p> Signup and view all the answers

Photosynthesis occurs in chloroplasts and cellular respiration occurs in mitochondria.

<p>True (A)</p> Signup and view all the answers

What type of fermentation does the human body undergo?

<p>lactic acid</p> Signup and view all the answers

Which type of fermentation is found in bacteria, yeasts, and fungi?

<p>alcoholic (C)</p> Signup and view all the answers

The overall equation for cellular respiration is __________.

<p>C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy</p> Signup and view all the answers

Match the following terms with the correct descriptions:

<p>Gametes = Haploid reproductive cells Mitosis = Cell division for growth and repair Meiosis = Cell division for producing gametes Nondisjunction = Failure of chromosomes to separate</p> Signup and view all the answers

In humans, mitosis produces duplicate daughter cells with 46 chromosomes.

<p>True (A)</p> Signup and view all the answers

How many pairs of chromosomes do humans have?

<p>23 pairs</p> Signup and view all the answers

What is the role of oxygen in cellular respiration?

<p>It is a reactant necessary for the process. (A)</p> Signup and view all the answers

Mitosis produces identical daughter cells, while meiosis produces cells with half the normal number of chromosomes.

<p>True (A)</p> Signup and view all the answers

What is dehydration synthesis?

<p>The process of building a polymer by the removal of water.</p> Signup and view all the answers

Both photosynthesis and cellular respiration create a ____ cycle for life.

<p>perfect</p> Signup and view all the answers

Match the following processes with their definitions:

<p>Cellular respiration = Process that breaks down glucose to produce energy Photosynthesis = Process that converts sunlight into chemical energy Dehydration synthesis = Formation of polymers by removing water Hydrolysis = Breaking down of polymers by adding water</p> Signup and view all the answers

Which of the following statements about mitosis and meiosis is true?

<p>Meiosis produces haploid cells. (B)</p> Signup and view all the answers

Eating food is an essential process for autotrophs.

<p>False (B)</p> Signup and view all the answers

What could be a potential issue with the word 'theory' in scientific and non-scientific contexts?

<p>The term 'theory' has different meanings outside of science; it may imply an educated guess.</p> Signup and view all the answers

Flashcards

What are the four most common elements in living organisms?

The four most common elements found in living organisms are carbon, hydrogen, nitrogen, and oxygen. They are the building blocks of all biological molecules.

Where are protons and neutrons located?

Protons and neutrons are located inside the atomic nucleus.

Which subatomic particle forms chemical bonds?

Electrons are responsible for making chemical bonds by forming interactions with other atoms.

What is the atomic number of an atom with 2 protons, 2 neutrons, and 2 electrons?

The atomic number of an atom is equal to the number of protons it contains. In this case, the atom has 2 protons, therefore its atomic number is 2.

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What is the atomic mass of an atom with 2 protons, 2 neutrons, and 2 electrons?

The atomic mass of an atom is the sum of its protons and neutrons. This atom has 2 protons and 2 neutrons, meaning its atomic mass is 4.

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What is a polar covalent molecule?

A polar covalent molecule has an uneven distribution of electrons, resulting in a molecule with a slightly positive end and a slightly negative end.

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What kind of bond involves the sharing of electrons?

Covalent bonds are formed by the sharing of electrons between atoms.

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What kind of bond involves the transfer of electrons?

Ionic bonds are formed when electrons are transferred from one atom to another. This transfer creates charged atoms called ions, which attract each other.

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Polymer

A large molecule made up of repeating smaller units called monomers.

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Dehydration synthesis

The process of building a polymer by removing a water molecule.

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Hydrolysis

The process of breaking down a polymer by adding a water molecule.

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Monosaccharide

The basic building block of a carbohydrate.

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Amino acid

The building block of a protein.

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Nucleotide

The building block of nucleic acids like DNA and RNA.

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Prokaryotic cell

A cell that does not have a nucleus or membrane-bound organelles.

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Eukaryotic cell

A cell that has a nucleus and membrane-bound organelles.

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Hypotonic Solution

A solution with a lower concentration of dissolved substances compared to a cell. Water moves into the cell to balance the concentration.

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Hypertonic Solution

A solution with a higher concentration of dissolved substances compared to a cell. Water moves out of the cell to balance the concentration.

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Passive Transport

The movement of particles from an area of high concentration to an area of low concentration. Does not require energy.

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Active Transport

The movement of particles from an area of low concentration to an area of high concentration. Requires energy.

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Endocytosis

The process by which a cell takes in material by engulfing it with its membrane and forming a vacuole around it.

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Facilitated Diffusion

A form of passive transport that uses transport proteins to move molecules across a membrane.

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Osmosis

The diffusion of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration.

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Autotrophs

Organisms that can create their own food through photosynthesis.

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Which objective lens provides the widest viewing angle?

The scanning objective lens provides the widest viewing angle.

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What is the function of mitochondria?

Mitochondria carry out cell respiration, releasing energy in the form of ATP.

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What is the function of chloroplasts?

Chloroplasts are responsible for photosynthesis, converting light energy into chemical energy.

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Which organelle is involved in cellular waste breakdown and recycling?

Lysosomes are membrane-bound organelles that break down cellular waste and damaged organelles, playing a crucial role in cellular recycling.

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Which organelle is abundant in detoxification organs and plays a role in energy metabolism?

Peroxisomes are membrane-bound organelles that contain oxidative enzymes involved in energy metabolism. They are prevalent in detoxifying organs like the liver and kidneys.

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Where are proteins that stay within the cell made?

Proteins destined to remain within the cell are synthesized on free ribosomes.

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What controls the passage of substances into and out of the cell?

The plasma membrane controls the movement of substances into and out of the cell, acting as a selective barrier.

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Which organelle is responsible for making lipids for cell membrane repair?

The smooth endoplasmic reticulum synthesizes lipids, including components for cell membrane repair.

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What is the stroma?

The fluid-filled space within a chloroplast, where the Calvin cycle takes place during photosynthesis.

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Photosynthesis occurs in chloroplasts and cellular respiration in mitochondria. True or False?

True. Photosynthesis occurs in chloroplasts, which contain chlorophyll for capturing light energy. Cellular respiration happens in mitochondria, which break down glucose for energy.

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What type of fermentation does the human body undergo?

Lactic acid fermentation is the process that occurs in human muscle cells during intense exercise when oxygen is limited.

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What type of fermentation occurs in bacteria, yeasts, and Fungi?

Alcoholic fermentation is the process used by bacteria, yeasts, and fungi to produce alcohol and carbon dioxide.

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What is the correct order of these stages : electron transport chain, glycolysis, and Krebs cycle?

The correct order for the stages of cellular respiration is glycolysis, Krebs cycle, and electron transport chain.

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The sequence of events in glycolysis, Krebs cycle, and electron transport chain is part of what process?.

The sequence of events in glycolysis, Krebs cycle, and electron transport chain is part of cellular respiration.

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What is the common stage between aerobic and anaerobic metabolism?

Glycolysis is the only stage common to both aerobic and anaerobic metabolism.

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What type of cellular respiration does not require oxygen?

Anaerobic respiration is a type of cellular respiration that does not require oxygen.

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Cellular Respiration

The process by which organisms break down glucose to release energy. It requires oxygen and produces carbon dioxide and water as byproducts.

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Heterotroph

Organisms that cannot produce their own food and must obtain it from other sources.

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Photosynthesis

The process by which plants convert light energy into chemical energy in the form of glucose. It requires carbon dioxide and water and produces oxygen as a byproduct.

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Scientific theory

A well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses.

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Study Notes

Unit 1: Laboratory General Procedures, Safety, Emergency Procedures and Biology Lab Equipment

  • Lab Equipment Identification: Use the letters provided to identify lab equipment. Example: Beaker (A), Flask (B), etc.

  • Safety Procedures: Always know the location and use of safety equipment (safety shower, eyewash, fire extinguisher).

  • Sharp Instruments: Direct sharp instruments away from yourself and others.

  • Lab Injuries: If injured, apply pressure to the cut immediately and get medical attention, whether the cut is severe or not. Report all accidents, breakages, and procedural errors to a teacher immediately.

  • Waste Disposal: Dispose of used matches in a water-filled container.

Unit 2: The Science and Chemistry of Life

  • Relative Acidity: A pH 2 solution is 100 times more acidic than a pH 0 solution.

  • Biological Hierarchy: List the following in increasing order: molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem.

  • Properties of Life: All organisms reproduce, maintain constant internal temperature, and respond to stimuli.

  • Control Groups: In experiments, control groups provide a baseline for comparison with the experimental group..

  • Common Biological Elements: The four most common elements in living organisms are carbon, hydrogen, nitrogen, and oxygen.

  • Atomic Particles: Subatomic particles located inside the atomic nucleus are protons and neutrons.

  • Subatomic particles located outside the atomic nucleus include electrons.*

  • Chemical Bonds: Electrons are involved in chemical bonding.

  • Types of Chemical Bonds: Covalent bonds use electron sharing, ionic bonds use electron transfer.

Unit 3: Biochemistry

  • Macromolecules: Label the macromolecules: carbohydrates, lipids, nucleic acids, and proteins.

  • Polymer Synthesis: Polymers are built through dehydration synthesis (removing water).

  • Bonding: Atoms bond to become more stable.

  • Carbohydrates: Monomer is a monosaccharide.

  • Nucleic Acids: Monomer is a nucleotide.

  • Lipids: Do not contain nucleotides.

  • Proteins: Monomer is an amino acid.

Unit 4: Cell Structure, Cell Function, and the Microscope

  • Cell Types: Bacteria are prokaryotic, while plants and animal cells are eukaryotic. Eukaryotic cells contain membrane-bound organelles.

  • Cell parts: The nucleus, Golgi apparatus, and ribosomes are components of the cell.

  • Microscope Parts: Describe the function of the microscope parts like ocular lens, illuminator, stage clips, etc.

  • Microscope Adjustments: The fine adjustment knob is used with high-power objective lenses.

  • Microscopes: The scanning objective lens has the greatest viewing angle.

  • Cellular Functions: Mitochondria carry out cell respiration, and chloroplasts participate in photosynthesis.

Unit 5: Homeostasis and Cell Transport

  • Plasma Membrane: The plasma membrane is selectively permeable.

  • Solutions:

    • Hypertonic solution: causes cells to shrivel.
    • Hypotonic solution: causes cells to swell.
    • Isotonic solution: maintains cell shape as the concentration of dissolved substances in the solution is equal to the concentration inside the cell.
  • Transport Types: passive transport (no energy required, moves from high to low concentration), and active transport (requires energy, moves from low to high concentration).

Unit 6 and 7: Photosynthesis and Cellular Respiration

  • Photosynthesis Location: Photosynthesis occurs in chloroplasts.

  • Photosynthesis Process: Includes the light reaction, and the Calvin cycle (inputs needed are carbon dioxide and water to produce glucose and oxygen).

  • **Respiration:**Cellular Respiration occurs in the mitochondria.

  • Fermentation: A metabolic process that occurs in the absence of oxygen (example: lactic acid fermentation).

Unit 8 and 9: Cell Reproduction and Modern Genetics

  • Cell division: Mitosis produces identical cells; meiosis produces genetically different cells.

  • Mitosis Process: Includes interphase, prophase, metaphase, anaphase, and telophase.

  • Meiosis: Results in the production of gametes (sex cells).

  • Genetics: Use Punnett squares for predicting genetic outcomes, and determining genotypes and phenotypes.

  • Cell Cycle: Most of a eukaryotic cell's time is spent in interphase.

  • Characteristics: Observable characteristics of a trait/organism (e.g.: observable physical features such as height or eye colour) are called the phenotype. Their genetic makeup, or the combination of alleles an organism possesses, is called the genotype.

  • Modern Genetics Concepts: Discuss terms and concepts in modern genetics.

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Test your knowledge on the fundamental concepts of biology with this quiz covering essential elements, chemical bonds, and the functions of biological molecules. Explore questions about atoms, molecules, and cellular functions. Perfect for students studying introductory biology.

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