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WorksheetsBiology
Total questions: 54
Worksheet time: 27mins
Which six elements make up most living organisms?
Na, Cl, K, Mg, Fe, Cu
CHNOPS
CO₂, H₂O, NaCl, Fe, P, N
C, O, K, Na, Fe, H
The atomic number of an element equals the number of:
Neutrons
Electrons + neutrons
Protons
Electrons in the outer shell
Two atoms with the same number of protons but different numbers of neutrons are called:
Ions
Isomers
Isotopes
Compounds
A covalent bond is formed when:
Electrons are transferred
Electrons are shared
One atom loses all electrons
Neutrons are exchanged
The weak attraction between water molecules is an example of a:
Ionic bond
Hydrogen bond
Peptide bond
Covalent bond
Water’s ability to stick to itself is called:
Cohesion
Adhesion
Evaporation
Hydration
Water’s ability to stick to other substances is called:
Cohesion
Adhesion
Saturation
Condensation
Which property of water helps stabilize body temperature?
High heat capacity
Low density as ice
Surface tension
Polarity
Why does ice float on water?
Ice is denser than liquid water
Ice forms a lattice that is less dense
Ice contains more hydrogen atoms
Ice has no oxygen molecules
On the pH scale, a substance with a pH of 3 is:
Neutral
Basic
Acidic
A buffer
Buffers help organisms maintain:
High energy levels
Constant pH
Proper hydration
Oxygen supply
Organic molecules must contain:
Carbon and hydrogen
Nitrogen and oxygen
Sodium and chlorine
Carbon and phosphorus
The reaction that joins monomers into polymers is called:
Hydrolysis
Dehydration synthesis
Denaturation
Respiration
The process that breaks polymers into monomers is:
Condensation
Oxidation
Hydrolysis
Neutralization
The monomer of carbohydrates is:
Amino acid
Monosaccharide
Fatty acid
Nucleotide
Which of the following is a disaccharide?
Glucose
Sucrose
Starch
Cellulose
Starch and glycogen are examples of:
Disaccharides
Monosaccharides
Polysaccharides
Lipids
Cellulose and chitin are:
Storage molecules
Structural polysaccharides
Simple sugars
Steroids
Phospholipids are important because they:
Store energy
Build DNA
Form cell membranes
Function as hormones
Which part of a phospholipid is hydrophobic?
Phosphate head
Glycerol
Fatty acid tail
Both head and tail
Proteins are made up of:
Fatty acids
Amino acids
Sugars
Nucleotides
The bond that connects amino acids in proteins is a:
Hydrogen bond
Ionic bond
Peptide bond
Glycosidic bond
Nucleic acids are made up of:
Nucleotides
Amino acids
Fatty acids
Polysaccharides
ATP releases energy when:
A phosphate bond forms
A phosphate bond breaks
Water is added
It is converted to RNA
DNA stores ________, while RNA helps ________.
Energy; build membranes
Genetic information; make proteins
Water; transport oxygen
Nutrients; release energy
The Cell Theory states that all cells come from:
Nonliving matter
Preexisting cells
DNA molecules
Organelles
Cell size is limited because:
Small cells have more DNA
A larger volume makes transport harder
Smaller cells can’t divide
Big cells can’t contain nuclei
Which of the following are prokaryotes?
Plants and fungi
Protists and animals
Bacteria and archaea
Fungi and algae
Prokaryotic cells lack:
DNA
A plasma membrane
A nucleus
Ribosomes
The three shapes of prokaryotic cells are:
Cube, round, spiral
Bacillus, coccus, spirilla
Square, circle, oval
Rod, cube, ring
The nucleus functions to:
Store DNA
Produce proteins
Make lipids
Generate ATP
Ribosomes are responsible for:
DNA replication
Protein synthesis
Lipid formation
Energy production
The rough endoplasmic reticulum is covered in:
Lysosomes
Ribosomes
Vesicles
Cilia
The smooth endoplasmic reticulum produces:
Proteins
Lipids
DNA
RNA
The Golgi apparatus:
Creates ribosomes
Modifies and packages molecules
Synthesizes DNA
Breaks down waste
Lysosomes function to:
Produce ATP
Digest waste and old organelles
Store genetic information
Transport gases
Mitochondria are the site of:
DNA replication
ATP production
Photosynthesis
Protein synthesis
Chloroplasts are found in:
Animal cells
Fungal cells
Plant cells
Bacteria
The cytoskeleton provides:
Energy storage
Cellular structure and movement
Genetic information
Enzymatic reactions
The three main parts of the cytoskeleton are:
Spindles, filaments, proteins
Microtubules, microfilaments, intermediate filaments
Ribosomes, vesicles, cilia
Collagen, microfibrils, elastin
Griffith’s experiment demonstrated:
Transformation in bacteria
That protein carries genes
DNA replication
ATP energy transfer
Avery’s experiment showed that:
RNA is the genetic material
DNA is the genetic material
Proteins cause transformation
Lipids control heredity
The Hershey–Chase experiment confirmed that:
Proteins carry genetic information
DNA, not protein, carries genetic information
Viruses contain no DNA
RNA controls replication
Nucleotides are made of:
Sugar, phosphate, and base
Sugar and amino acid
Base and lipid
Phosphate and protein
Purines include which nitrogen bases?
Adenine and guanine
Thymine and cytosine
Cytosine and uracil
Adenine and thymine
According to Chargaff’s rules, adenine pairs with:
Cytosine
Thymine
Guanine
Uracil
The shape of DNA is best described as a:
Single helix
Double helix
Beta sheet
Linear strand
DNA replication relies on:
Base pairing
Hydrogen bonding with proteins
Peptide bonds
RNA breakdown
DNA differs between species because of differences in:
Base sequence
Sugar type
Phosphate count
Number of chromosomes only
The stage of the cell cycle where DNA is replicated is:
G1
S phase
G2
Mitosis
During interphase, the cell:
Divides
Performs normal functions and prepares to divide
Stops growing
Destroys its nucleus
The purpose of mitosis is:
Sexual reproduction
Growth, repair, and asexual reproduction
DNA mutation
Energy production
During metaphase:
Chromosomes condense
Chromosomes line up at the cell’s center
Sister chromatids separate
The nuclear envelope reforms
Cytokinesis in plant cells involves the formation of a:
Cleavage furrow
Cell plate
Nuclear envelope
Spindle fiber
