Biology Toughest Practice Quiz: Test!

200 Questions | Attempts: 40
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  • 1/200 Questions

    The organelles in plant cells that contain a green pigment are the 

    • Mitochondria
    • Bilayer lipids
    • Chloroplasts
    • Golgi apparatus
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About This Quiz

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Biology Toughest Practice Quiz: Test! - Quiz

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  • 2. 

    The scientific study of heredity is called 

    • Inheritance research

    • Mendelian studies

    • Genetics

    • Selective breeding

    Correct Answer
    A. Genetics
  • 3. 

    The primary function of DNA is to 

    • Make proteins

    • Store and transmit genetic information

    • Control chemical precesses within cells

    • Prevent mutations

    Correct Answer
    A. Store and transmit genetic information
  • 4. 

    The process whereby plants capture energy and make complex molecules is known as 

    • Homeostasis

    • Evolution

    • Photosynthesis

    • Development

    Correct Answer
    A. Photosynthesis
  • 5. 

    Suspended in the fluid stroma of chloroplasts are 

    • Organelles called eukaryotes

    • Numerous mitochondrial membranes

    • Small coins that provide energy

    • Stacks of thylakoids called grana

    Correct Answer
    A. Stacks of thylakoids called grana
  • 6. 

    Homologous structures in organisms provide evidence that the organisms 

    • Share a common ancestor

    • Must have lived at different times

    • Have skeletal structure

    • Are now extinct

    Correct Answer
    A. Share a common ancestor
  • 7. 

    Atoms are composed of 

    • Protons with s positive charge

    • Neutrons with no charge

    • Electrons with a negative charge

    • All of the above

    Correct Answer
    A. All of the above
  • 8. 

    Polar molecules such as water have 

    • No negative or positive poles

    • Both negative or positive poles

    • Only a negative pole

    • Only a positive pole

    Correct Answer
    A. Both negative or positive poles
  • 9. 

    Which organic molecule below is classified as a carbohydrate? 

    • Amino acid

    • CH2 Chain

    • Nucleotide

    • Sugar

    Correct Answer
    A. Sugar
  • 10. 

    If an individual possess two recessive alleles for the same trait, the individual is said to be 

    • Homozygous recessive

    • Homozygous dominant

    • Heterozygous dominant

    • Heterozygous recessive

    Correct Answer
    A. Homozygous recessive
  • 11. 

    Each organism has a unique combination of characteristics encoded in molecules of 

    • Protein

    • Enzymes

    • Carbohydrates

    • DNA

    Correct Answer
    A. DNA
  • 12. 

    The ancestors of today's land plants were probably 

    • Brown algae

    • Red algae

    • Green algae

    • Lichens

    Correct Answer
    A. Green algae
  • 13. 

    The smallest units of life in all living things are 

    • Cells

    • Mitochondria

    • Cytoplasm

    • Golgi apparatus

    Correct Answer
    A. Cells
  • 14. 

    When tow solutions in different concentrations are separated by a membrane, there is a difference in concentration across the space. This is known as a 

    • Concentration difference

    • Concentration gradient

    • Soulte differential

    • Water differential

    Correct Answer
    A. Concentration gradient
  • 15. 

    The surface of Earth is protected from damming ultraviolet light by

    • Oxygen

    • Ozone

    • Hydrogen

    • Nitrogen

    Correct Answer
    A. Ozone
  • 16. 

    Anatomical structures that appear to be derived from a functional strutter in an ancestor, but that current do not served as unimportant function, are called 

    • Inorganic

    • Mutated

    • Fossilized

    • Vestigial

    Correct Answer
    A. Vestigial
  • 17. 

    Acidic solutions have a pH that is 

    • Less than 7

    • Between 0 and 14

    • A negative number

    • More than 7

    Correct Answer
    A. Less than 7
  • 18. 

    The organelles associated with photosynthesis are the 

    • Mitochondria

    • Chloroplasts

    • Golgi apparatus

    • Vacuoles

    Correct Answer
    A. Chloroplasts
  • 19. 

    Amino acids are monomers of 

    • Disaccharides

    • Proteins

    • Nucleotides

    • Steroids

    Correct Answer
    A. Proteins
  • 20. 

    Nucleic acids include 

    • Chlorophyl and retinal

    • DNA and RNA

    • Lipids and sugars

    • Glucose and glycogen

    Correct Answer
    A. DNA and RNA
  • 21. 

    ALL active transport systems required this molecule to function 

    • Glucose

    • Sodium

    • Potassium

    • ATP

    Correct Answer
    A. ATP
  • 22. 

    The function of tRNA is to 

    • Synthesize DNA

    • Synthesize mRNA

    • Form ribosomes

    • Transfer amino acids to ribosomes

    Correct Answer
    A. Transfer amino acids to ribosomes
  • 23. 

    Which of the following is not found in DNA?

    • Adenine

    • Cytosine

    • Uracil

    • All of the above

    Correct Answer
    A. Uracil
  • 24. 

    During translation, a ribosome binds to 

    • DNA

    • MRNA

    • Protein

    • A peptide bond

    Correct Answer
    A. MRNA
  • 25. 

    If a plant's flowers are very colorful and produce nectar, the plant is probably pollinated by 

    • Water

    • Wind

    • Insects

    • Self-pollianation

    Correct Answer
    A. Insects
  • 26. 

    The "father" of genetics was 

    • T.A. Knight

    • Hans Krebs

    • Gregor Mendel

    • None of the above

    Correct Answer
    A. Gregor Mendel
  • 27. 

    Plasma membranes 

    • Are part of only a small number of cells

    • Contain genes

    • Are made of DNA

    • Are thin coverings that surround cells

    Correct Answer
    A. Are thin coverings that surround cells
  • 28. 

    A calcium ion channel will allow 

    • Any kind of ion to pass through it

    • Only calcium ions to pass through it

    • Positive ions to pass through it

    • None of the above

    Correct Answer
    A. Only calcium ions to pass through it
  • 29. 

    Diffusion takes place 

    • Only through a lipid bilayer

    • From an area of low concentration to an area of high concentration

    • Only in liquids

    • From an area of high concentration to an area of low concentration

    Correct Answer
    A. From an area of high concentration to an area of low concentration
  • 30. 

    Molecules that can simple diffuse through the cell membrane (pass throng the lipid bilayer) are typically 

    • Large and in charge

    • Small and polar

    • Ionic

    • Non-olar

    Correct Answer
    A. Small and polar
  • 31. 

    The sun is considered the ultimate source of energy for life on Earth because 

    • All organisms carry out photosynthesis

    • All organisms carry out respiration

    • Either photosynthetic organisms or organism that have eaten them provide energy for all other organisms on Earth

    • The sun heats Earth's atmosphere

    Correct Answer
    A. Either photosynthetic organisms or organism that have eaten them provide energy for all other organisms on Earth
  • 32. 

    The names of the scientists that discovered that DNA is a double helix are 

    • Hershey and Chase

    • Avery and Mendel

    • Watson and Crick

    • Ben and Jerry

    Correct Answer
    A. Watson and Crick
  • 33. 

    RNA 

    • Has a three-dimension structure

    • Is a nucleic acid

    • Can act like an enzyme

    • All of the above

    Correct Answer
    A. All of the above
  • 34. 

    A pathogen is an agent that is 

    • Beneficial to humans

    • Harmful only to plants

    • Harmful to living organisms

    • Nearly extinct

    Correct Answer
    A. Harmful to living organisms
  • 35. 

    Autotrophs are organisms that can 

    • Produce food from inorganic molecules and sunlight

    • Survive without energy

    • Consume other organisms for energy

    • Carry out aerobic respiration

    Correct Answer
    A. Produce food from inorganic molecules and sunlight
  • 36. 

    When light strikes an object, the light may be 

    • Reelected

    • Absorbed

    • Transmitted

    • All of the above

    Correct Answer
    A. All of the above
  • 37. 

    The smallest particle of carbon that can retain the chemical properties of carbon is 

    • A carbon molecule

    • A carbon macromolecule

    • A carbon atoms

    • The nucleus of a carbon atom

    Correct Answer
    A. A carbon atoms
  • 38. 

    Enzymes

    • Are able to heat up molecules so that they can react

    • Provide CO2 for chemical reactions

    • Are biological catalysts

    • Absorb excess heat so that reactions occur at low temperatures

    Correct Answer
    A. Are biological catalysts
  • 39. 

    Only eukaryotic cells have 

    • DNA

    • Membrane-bound organelles

    • Ribosomes

    • Cytoplasm

    Correct Answer
    A. Membrane-bound organelles
  • 40. 

    Without enzymes, the chemical reactions in the body would 

    • Happen too fast

    • Occur at much the same rate as they do with enzymes

    • Require a different pH

    • Occur too slowly to support life processes

    Correct Answer
    A. Occur too slowly to support life processes
  • 41. 

    The process by which water passes into or out of the cell is called 

    • Solubility

    • Osmosis

    • Selective transport

    • Endocytosis

    Correct Answer
    A. Osmosis
  • 42. 

    Negatively charged particles that move around the outside of an atom's nucleus is called 

    • Electrons

    • Protons

    • Neutrons

    • Ions

    Correct Answer
    A. Electrons
  • 43. 

    The phenotype of an organism 

    • Represents its genetic composition

    • Reflects all the traits that are actually expressed

    • Occurs only in dominant pure organisms

    • Cannot be seen

    Correct Answer
    A. Reflects all the traits that are actually expressed
  • 44. 

    In order to fit within a cell, DNA becomes more compact by 

    • Breaking apart into separate genes

    • Extending to form very long, thin molecules

    • Wrapping tightly, around associated proteins

    • Being enzymatically charged into a protein

    Correct Answer
    A. Wrapping tightly, around associated proteins
  • 45. 

    Which of the following bacteria are thought to be responsible for establishing Earth's oxygen-rich atmosphere?

    • Methanogens

    • Extreme halophiles

    • Cyanobateria sp.

    • Spirochetes

    Correct Answer
    A. Cyanobateria sp.
  • 46. 

    Many animals have a head that is located at the _____ end of their body and a tail that is located at the _____ end of their body. 

    • Ventral; dorsal

    • Dorsal; ventral

    • Anterior; posterior

    • Posterior;anterior

    Correct Answer
    A. Anterior; posterior
  • 47. 

    The haploid form in a plant's life cycle is called the 

    • Sporophyte

    • Gametophyte

    • Parental generation

    • Alternate generation

    Correct Answer
    A. Gametophyte
  • 48. 

    Mendel obtained his P generation by allowing the plants to 

    • Self-pollinate

    • Cross-pollinate

    • Assort independently

    • Segregate

    Correct Answer
    A. Self-pollinate
  • 49. 

    The size to which a cell can grow is limited by its 

    • Location

    • Structure

    • Function

    • Surface area

    Correct Answer
    A. Surface area

Quiz Review Timeline (Updated): Mar 17, 2022 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 17, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 06, 2014
    Quiz Created by
    Brians238

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