Biomolecules
1. Which biomolecule is the main source of quick energy for cells?
A. Lipids
B. Carbohydrates
C. Proteins
D. Nucleic acids
What is Carbohydrates!
1. Which organelle is responsible for producing ATP during cellular respiration?
A. Ribosome
B. Mitochondrion
C. Vacuole
D. Nucleus
What is the mitochondrion
1. Which component makes up the "rungs" of a DNA molecule?
A. Sugars and phosphates
B. Paired nitrogen bases
C. Amino acids
D. Lipids
What is sugars and phosphates
1. Which process converts DNA instructions into a strand of mRNA?
A. Translation
B. Transcription
C. Replication
D. Meiosis
What is transcription
What biomolecule is chitin?
What is a carbohydrate
2. Enzymes speed up chemical reactions by—
A. raising activation energy
B. lowering activation energy
C. increasing temperature
D. storing genetic material
What is lowering activation energy
2. When a cell is placed in a hypertonic solution, water will—
A. enter the cell and cause swelling
B. leave the cell and cause shrinking
C. move equally in both directions
D. stop moving entirely
What is water leaves the cell causing shrinking
2. DNA replication occurs during—
A. prophase
B. S phase
C. cytokinesis
D. metaphase
What is S phase
2. A codon is a sequence of —
A. three amino acids
B. three nucleotides
C. three ribosomes
D. three proteins
What is three nucelotides
What is a catalyst?
What is a substance that speeds up a chemical reaction without being used up or changed in the process.
3. Which monomer pairs correctly with its biomolecule?
A. Amino acids → lipids
B. Nucleotides → nucleic acids
C. Simple sugars → proteins
D. Fatty acids → carbohydrates
What is Nucleotides → Nucleic acids
3. Active transport differs from diffusion because active transport—
A. requires energy
B. moves substances down the gradient
C. only transports water
D. cannot use proteins
What is requires energy
3. A mutation that changes one nitrogen base but does NOT change the amino acid is called—
A. nonsense
B. silent
C. frameshift
D. deletion
What is silent mutation
3. Which molecule carries amino acids to the ribosome?
A. DNA
B. mRNA
C. tRNA
D. rRNA
What is tRNA
What is the order of mitosis?
PMAT!
4. Which factor would MOST likely reduce the activity of an enzyme?
A. Optimal pH
B. High heat
C. Correct substrate
D. Stable temperature
What is high heat
4. Which process do plants use to trap sunlight and store energy?
A. Cellular respiration
B. Photosynthesis
C. Fermentation
D. Transpiration
What is photosynthesis
4. During which phase of mitosis do chromosomes line up in the middle of the cell?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
What is metaphase
4. Gene expression is influenced by environmental conditions. Which example BEST demonstrates this?
A. Hair color is inherited from parents.
B. A plant grows taller after receiving fertilizer.
C. A rabbit’s fur color changes in cold temperatures.
D. Bacteria divide rapidly in a nutrient-rich broth.
What is rabbit’s fur color changes in cold temperatures
What factors activate or deactivate genes?
What is environmental conditions such as temperature, toxic chemicals, radiation and exposure to toxins
5. Lipids are important in cell membranes because they—
A. code for proteins
B. provide immediate energy
C. form a waterproof barrier
D. break down toxins
What is form a waterproof barrier
5. Large molecules are moved out of a cell through—
A. diffusion
B. osmosis
C. endocytosis
D. exocytosis
What is excoytosis
5. A cell that begins mitosis with 20 chromosomes will end with—
A. 10 chromosomes
B. 20 chromosomes
C. 40 chromosomes
D. 5 chromosomes
What is 40 chromosomes
5. Cells in the same organism look different because they—
A. have different DNA
B. express different genes
C. contain different proteins
D. undergo different types of mitosis
What is express different genes