NEW
Font size
WorksheetsBiology Section Quiz
Total questions: 55
Worksheet time: 28mins
Which phrase best describes atoms?
a.single-celled organism
b.smallest basic units of matter
c.parts of a nucleus
d.positively charged particles
Which of the following cannot be broken down by ordinary chemical means?
element
compound
molecule
bond
What is a compound?
two atoms of a single element bonded together
atoms of different elements bonded together in certain ratios
separate atoms of multiple elements in varying ratios
a molecule of two oxygen atoms
4. An ion is formed when an atom gains or loses
protons
neutrons
bonds
electrons
Atoms connected by covalent bonds share
pairs of electrons
ionic compounds
carbon and oxygen
hydrogen ions
carbon is unique due to the carbon atom's
bonding properties
six outer unpaired electrons
ionic compounds
hydrogen bonding strength
Which category of carbon-based molecules includes sugars and starches?
unsaturated fatty acids
phospholipids
proteins
carbohy drates
Fats, oils, and cholesterol are all types of
cell membranes
hormones
lipids
fatty acids
Proteins are composed of which molecules
amino acids
fatty acids
monosaccharides
nucleic acids
DNA and RNA are two types of
proteins
nucleic acids
lipids
carbohydrates
Which phrase best describes the effect of a catalyst on a chemical reaction?
increases the temperature
increases the volume of reactants
decreases the reaction rate
decreases the activation energy
Which statement best describes the graph shown?
More energy is released by the original reaction
Less energy is needed to start reaction B
The original reaction is catalyzed
Reaction B occurs at a slower rate
Enzymes affect chemical reactions in living organisms by
changing the direction of a reaction
breaking down molecules into starch
increasing the temperature range
weakening bonds in reactants
The specific reactants that an enzyme acts on are called
catalysts
proteins
substrates
amino acids
Changes in temperature and pH can decrease an enzyme's activity by breaking
hydrogen bonds
peptide bonds
amino acids
sulfur-sulfur bonds
Which invention played the biggest role in the discovery of cells by early scientists?
magnifying glass
lens
eyeglasses
compound microscope
The cell theory states that all organisms are made of cells; cells are the most basic unit of life; and
all existing cells form by free-cell formation
all cells are eukaryotic
all existing cells are produced by other living cells
all cells have a nucleus
What is the term for the jellylike substance that is contained inside the cell menbrane?
cytoplasm
DNA
organelle
nucleus
Unlike a eukaryotic cell, a prokaryotic cell does not have
DNA
a cell membrane
cytoplasm
a nucleus
Specialized structures that work together inside a cell are called
organelles
prokaryotes
eukaryotes
nuclei
Which of the following is a network of proteins that supports and gives shape to a cell?
vesicles
vacuole
cytoskeleton
cytoplasm
What is the main function of the Golgi apparatus?
communicate with other cells
convert solar energy to chemical energy
process and deliver proteins
copy genetic material
Which of the following organelles can be found in the cytoplasm and on the surface of the endoplasmic reticulum?
mitochondria
centrosomes
ribosomes
centrioles
Which organelle contains enzymes that break down damaged cell parts?
centriole
lysosomes
vacuole
mitochondria
What are the main differences between plant and animal cells?
Animal cells are eukaryotes and plant cells are not.
Plant cells are eukaryotes and animal cells are not.
Animal cells have cell walls and chloroplasts; plant cells do not.
Plant cells have cell walls and chloroplasts; animal cells do not.
Which model did scientists develop to describe the cell membrane?
phospholipid model
dynamic model
fluid mosaic model
transport model
Which word best describes the structure of the cell membrane?
layered
rigid
impermeable
nonpolar
What is a phospholipid composed of?
a polar head and a nonpolar tail
a nonpolar head and a polar tail.
a polar head and tail
a nonpolar head and tail
Which phrase best describes the property of selective permeability?
some molecules pass
all ions pass
large molecules pass
all molecules pass
A ligand produces a response in a cell if it finds the right kind of
carbohydrate
hormone
membrane
receptor
Which phase best describes passive transport?
requires transport proteins
requires no energy from the cell
requires an isotonic solution
requires facilitation by enzymes
Water moves into a cell when the solution surrounding the cell s
hypertonic
hypotonic
isotonic
concentrated
What is the term for the diffusion of water across a semipermeable membrane?
osmosis
equilibrium
transport
isntonic
The movement of molecules down a concentration gradient through transport proteins in the cell membrane is a type of
selective transport
osmosis
energy expenditure
facilitated diffusion
The difference in the concentration of dissolved particles from one location to another is called a
concentration gradient
concentrated solution
saline solution
dynamic gradient
Unlike passive transport, active transport requires
concentration gradient
diffusion
energy from the cell
vesicles
Which process uses proteins to move molecules against a concentration gradient?
active transport
passive transport
endocytosis
phagocytosis
Cells use active transport proteins to
obtain molecules they need
break down molecules
engulf large particles
detect the charge of molecules
A membrane-bound sac used to transport substances into and out of cells is a
pump
macrophage
lysosome
vesicle
Which process is used to release insulin from pancreatic cells into the bloodstream?
exocytosis
endocytosis
active transport
passive transport
Which of the following statements is true for all cells?
They use solar energy.
They use photosynthesis
They use chemical energy
They use chemosynthesis.
Which phrase best describes the function of the ATP molecule?
stores energy
carries energy
absorbs energy
converts energy
Where does the chemical energy to produce ATP come from?
the conversion of ATP to ADP
the use of chemicals from the environment to build sugars.
the addition of a phosphate group to ATP
the breakdown of carbon-based molecules into smaller molecules
Energy is released from an ATP molecules for cellular processes when it
has a phosphate group removed
stores an extra phosphate group.
converts a phosphate group to ATP
produces a sugar molecule.
Which of the following is the source of energy used in chemosynthesis?
sunlight
heat from hydrothermal vents
chemical compounds
amino acids
Which of the following statements best describes the process of photosynthesis?
Plants use oxygen to make simple sugars.
Chlorophyll builds sugars in the thylakoid membrane.
Light breaks down water molecules and releases carbon dioxide
Chloroplasts absorb sunlight and store chemical energy.
What is the term for an organism that makes its own source of chemical energy?
decomposer
producer
chloroplast
protist
The main light- absorbing molecules found in plant leaves are called
chloroplasts
thylakoid
chlorophyll
grana
The function of the light- dependent reactions is to
build sugars
capture and transfer energy
release carbon dioxide
form water molecules
The light- independent reactions of photosynthesis need
carbon dioxide
oxygen
water
cellulose
Which of the following takes place in the light-dependent reactions of photosynthesis?
Sugars are made
Energy is captured
Chlorophyll is pumped
CO2 is formed
Where do the hydrogen ions for the photosystems of the light-dependent reactions come from?
sugars
sunlight
acids
water
Which phrase best describes the electron transport chain in photosyntesis?
a chain of photosynthetic proteins located in the stroma
a collection of enzymes used to made ADP
a series of proteins located in the thylakoid membrane
a group of enzymes that carries energy to the Calvin cycle.
In the light -independent reactions of photosynthesis
CO2 enters the Calvin cycle and sugars are made
H2O is broken down and oxygen is released
NADPH is produced and transferred to photosystem I.
electrons are energized and used to pump H+ ions.
What is the relationship between the photosystems and the Calvin cycle?
The photosystems produce ATP synthase for the Calvin cycle.
The photosystems transfer hydrogen ions and carbon dioxide to the Calvin cycle.
The photosystems transfer energy to the Calvin cycle through ATP and NADPH
The photosystems build sugars with the carbon dioxide produced by the Calvin cycle.
