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Q.1
What is the significance of nucleic acids for cells?
They generate energy for the cell.
They restrict what enters and leaves the cell.
They support and maintain the shape of the cell.
They provide all instructions for cellular activities.
Q.2
Which organic molecule serves as a catalyst?
lipids
proteins
nucleic acid
carbohydrates
Q.3
Which best explains the function of the sequence of nucleotides?
It provides energy.
It carries genetic information.
It allows DNA to be successfully copied.
It determines the shape of the DNA molecule.
Q.4
Which is a function of lipids?
to supply cells with quick–release energy
to provide the body with insulation
to store genetic information
to regulate cell processes
Q.5
What products are produced during photosynthesis?
chloride and sugar
nitrogen and sugar
carbon dioxide and sugar
oxygen and sugar
Q.6
What are the products of aerobic cellular respiration?
glucose and water
glucose and oxygen
carbon, hydrogen, and water
carbon dioxide, water, and energy
Q.7
How do photosynthesis and cellular respiration differ?
Photosynthesis uses food and cellular respiration produces food.
Photosynthesis uses oxygen and cellular respiration uses carbon dioxide.
Photosynthesis breaks down carbohydrates and cellular respiration produces carbohydrates.
Photosynthesis gives off oxygen and cellular respiration uses oxygen.
Q.8
All organic compounds contain the element
carbon
nitrogen
phosphorus
sulfur
Q.9
What is the attraction between molecules of different substances?
Adhesion
Suspension
Cohesion
Solution
Q.10
Which energy level has the highest amount of energy?
first shell (closest the nucleus)
second shell
third shell (farthest from nucleus)
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