Scientific Inquiry and Life
This fundamental entity is considered the smallest functional unit of life.
A) Molecule
B) Organelle
C) Cell
D) Tissue
C) Cell
$100 Clue: The atomic nucleus contains these two subatomic particles, while electrons inhabit orbitals around it.
A) Protons and electrons
B) Protons and neutrons
C) Neutrons and electrons
D) Positrons and neutrons
Answer: B) Protons and neutrons
$100 Clue: Phospholipids naturally form this two-layered sheet in water because they possess both hydrophilic and hydrophobic regions.
A) Lipid bilayer
B) Micelle
C) Liposome
D) Lipid raft
Answer: A) Lipid bilayer
$100 Clue: The net diffusion of water across a selectively permeable membrane toward a higher solute concentration is known as this process.
A) Facilitated diffusion
B) Active transport
C) Osmosis
D) Exocytosis
Answer: C) Osmosis
$100 Clue: This biological framework describes the directional flow of genetic information: DNA to RNA to Protein.
A) Cell theory
B) Endosymbiotic theory
C) Central dogma
D) Gene regulation model
Answer: C) Central dogma
$200 Clue: In a controlled experiment, this group is kept under baseline conditions to compare against the test group receiving the variable.
A) Control group
B) Experimental group
C) Independent group
D) Variable group
A) Control group
$200 Clue: This type of bond forms when two atoms share valence electrons equally, differing from the charged transfer in ionic bonds.
A) Nonpolar covalent bond
B) Polar covalent bond
C) Ionic bond
D) Hydrogen bond
Answer: A) Nonpolar covalent bond
$200 Clue: Unlike eukaryotic cells, prokaryotic cells lack membrane-bound organelles and house their circular DNA in this non-membrane-enclosed region.
A) Nucleus
B) Nucleolus
C) Nucleoid
D) Plasmid
Answer: C) Nucleoid
$200 Clue: Passive transport moves solutes down a concentration gradient, while active transport moves solutes in this direction.
A) Down their concentration gradient
B) Along the electrical gradient only
C) Against (up) their concentration gradient
D) Randomly without direction
Answer: C) Against (up) their concentration gradient
$200 Clue: Every nucleotide monomer in nucleic acids consists of these three structural components.
A) Amino acid, carboxyl group, and R-group
B) 5-carbon sugar, phosphate group, and nitrogenous base
C) Fatty acid, glycerol, and phosphate group
D) Glucose, ribose, and purine
Answer: B) 5-carbon sugar, phosphate group, and nitrogenous base
$300 Clue: Unlike a tentative, testable explanation for a specific observation, this is a broad, well-supported explanation for natural phenomena.
A) Prediction
B) Hypothesis
C) Fact
D) Theory
D) Theory
$300 Clue: Because oxygen has a higher electronegativity than hydrogen, water exhibits this property, making it an excellent solvent for hydrophilic molecules.
A) Hydrophobicity
B) Nonpolarity
C) Polarity
D) High viscosity
Answer: C) Polarity
$300 Clue: This interconnected organelle network includes the nuclear envelope, endoplasmic reticulum, Golgi apparatus, and lysosomes.
A) Cytoskeleton
B) Endomembrane system
C) Extracellular matrix
D) Endosymbiotic system
Answer: B) Endomembrane system
$300 Clue: Plant cells placed in a hypotonic environment build up this internal force against the cell wall, preventing them from bursting.
A) Osmotic equilibrium
B) Turgor pressure
C) Atmospheric pressure
D) Hydrostatic tension
Answer: B) Turgor pressure
$300 Clue: Because the 5′ end of one DNA strand aligns with the 3′ end of its partner strand, the double helix is described as having this orientation.
A) Parallel
B) Antiparallel
C) Symmetrical
D) Semiconservative
Answer: B) Antiparallel
$400 Clue: Mice living in sand dunes developing light tan fur to evade predators is an example of this evolutionary mechanism driven by differential survival and reproduction.
A) Genetic drift
B) Natural selection
C) Artificial selection
D) Gene flow
Answer: B) Natural selection
$400 Clue: This element's ability to form four stable covalent bonds in diverse arrangements makes it the backbone of organic molecules.
A) Nitrogen
B) Oxygen
C) Carbon
D) Hydrogen
Answer: C) Carbon
$400 Clue: Proteins destined for secretion or the plasma membrane carry this peptide tag, which is recognized by an SRP to direct ribosomes to the rough ER.
A) Nuclear localization signal
B) Signal sequence
C) Poly(A) tail
D) TATA box
Answer: B) Signal sequence
$400 Clue: Unlike open, pore-like channel proteins, these transport proteins must undergo alternating conformational shape changes to shuttle specific solutes across.
A) Peripheral proteins
B) Carrier proteins
C) Aquaporins
D) Receptor proteins
Answer: B) Carrier proteins
$400 Clue: Eukaryotic pre-mRNA processing includes intron splicing, polyadenylation, and the addition of this structure to the front of the transcript.
A) 3′ poly(A) tail
B) TATA box
C) 5′ cap
D) Promoter
Answer: C) 5′ cap
$500 Clue: This branching diagram visualizes the evolutionary relationships and common ancestry among various species.
A) Punnett square
B) Energy pyramid
C) Phylogenetic tree
D) Food web
Answer: C) Phylogenetic tree
$500 Clue: Containers of soda burst when frozen because water molecules expand into an open crystal lattice stabilized by these intermolecular attractions.
A) Ionic interactions
B) Covalent bonds
C) Hydrogen bonds
D) Hydrophobic interactions
Answer: C) Hydrogen bonds
$500 Clue: These two semi-autonomous organelles contain their own internal membranes and synthesize ATP for cellular energy.
A) Mitochondria and chloroplasts
B) Endoplasmic reticulum and Golgi apparatus
C) Lysosomes and peroxisomes
D) Ribosomes and vacuoles
Answer: A) Mitochondria and chloroplasts
$500 Clue: This transport mechanism uses the energy stored in an electrochemical gradient created by primary active transport to move a second solute.
A) Secondary active transport
B) Simple diffusion
C) Receptor-mediated endocytosis
D) Facilitated diffusion
Answer: A) Secondary active transport
$500 Clue: During the elongation phase of transcription, RNA polymerase synthesizes the growing RNA strand in this specific chemical direction.
A) 3′ to 5′
B) 5′ to 3′
C) N-terminus to C-terminus
D) Bidirectionally
Answer: B) 5′ to 3′