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Worksheets45 qs
Total questions: 45
Worksheet time: 23mins
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:
Ionic bond
Hydrogen bond
Peptide bond
Covalent bond
Water’s ability to stick to itself is called:
Cohesion
Adhesion
Evaporation
Hydration
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
Starch and glycogen are examples of:
Disaccharides
Monosaccharides
Polysaccharides
Lipids
Cellulose and chitin are examples of:
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
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
Prokaryotic cells lack:
DNA
A plasma membrane
A nucleus
Ribosomes
Which of the following are prokaryotes?
Plants and fungi
Protists and animals
Bacteria and archaea
Fungi and algae
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
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
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
The stage of the cell cycle where DNA is replicated is:
G1
S phase
G2
Mitosis
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
Uncontrolled cell division results in:
Cell differentiation
Cancer
Apoptosis
Binary fission
