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WorksheetsBiology Warm Up
Total questions: 20
Worksheet time: 10mins
A scientist heats an enzyme to 95°C. What MOST likely happens?
Bonds in the active site break, denaturing the enzyme
The enzyme speeds up permanently
The enzyme gains new substrates
Temperature has no effect
A long chain of amino acids folded into a 3D shape is which protein structure level?
Primary
Secondary
Tertiary
Quaternary
A molecule has C, H, O in a 1:2:1 ratio. It is most likely a:
Lipid
Carbohydrate
Protein
Nucleic acid
Which molecule would be MOST affected if a cell lacked nitrogen?
Enzymes
Phospholipids
Glucose
Cellulose
Which statement about phospholipids is correct?
They form double helices
They create a bilayer with hydrophobic tails inside
They are composed of amino acids
They store genetic material
A disaccharide forms by:
DNA replication
Hydrolysis
Dehydration synthesis
Electron transport
Which macromolecule is NOT used for energy?
Lipids
Carbohydrates
Proteins
DNA
Cellulose, chitin, and glycogen are ALL:
Lipids
Polysaccharides
Nucleotides
Triglycerides
Which evidence BEST supports the endosymbiotic theory?
Ribosomes in the ER
Mitochondria have their own DNA
Cells perform mitosis
Chloroplasts contain ribosomes identical to bacterial ones
A cell placed in hypertonic salt water will:
Swell
Burst
Shrink
Stay the same
Which transport requires a protein but NO energy?
Osmosis
Facilitated diffusion
Endocytosis
Sodium–potassium pump
Which organelle would be very abundant in a muscle cell?
Nucleus
Golgi
Mitochondria
Lysosomes
A cell is unable to package and export proteins. Which organelle is likely failing?
Ribosome
Golgi
Mitochondria
Lysosome
A student observes a cell with no nucleus but a cell wall. It is a:
Plant cell
Animal cell
Prokaryote
Virus
Which part of respiration produces the MOST ATP?
Glycolysis
Krebs cycle
Electron transport chain
Fermentation
Lactic acid fermentation is necessary when:
A cell has unlimited oxygen
ATP levels are high
No oxygen is present
Glucose is absent
What is the purpose of photosystem II?
Make ATP
Split water and release electrons
Produce glucose
Build DNA
A cell fails to pass the G₂ checkpoint. Which is MOST likely true?
DNA was not replicated correctly
Chromosomes are aligned
Spindle fibers formed early
Cytokinesis is complete
Which enzyme adds complementary DNA nucleotides?
Helixase
Polymerase
Ligase
Transcriptase
If part of a DNA strand reads: T A C A A G C C G What is the complementary DNA?
ATGTTCGGC
AUGUUCGGC
TACAA GCCG
CGGCTTGTA
