UNIT 3 REMEDIATION (2022-23)

Which statement best describes the role of ATP in a living system?

• ATP senses and adjusts the pH in the cellular environment.

• ATP identifies and repairs weak components of cells and tissues.

• ATP measures and provides heat to increase reaction rates in cells.

• ATP captures and transfers energy released by the breakdown of glucose.

An organism carries out both photosynthesis and cellular respiration. Which statement describes a difference between these two processes?

• Only cellular respiration creates chemical energy.

• The processes occur in different types of animal cells.

• Only photosynthesis changes light energy into chemical energy.

• The processes occur at different times during the animal’s life cycle.

Which statement best describes both mitochondria and chloroplasts?

• They both contain their own RNA and are involved in transcription.

• They both contain their own DNA and are involved in energy conversions.

• They both contain their own DNA and are involved in controlling the activities of a cell.

• They both contain their own RNA and are involved in storage of nuclear genetic material.

Cells obtain energy by either capturing light energy through photosynthesis or by breaking down carbohydrates through cellular respiration.  In both photosynthesis and cellular respiration, the energy is ultimately derived from the sun in a

• one-way process.

• reversible process.

• pathway that involves taking in heat from the environment at each step.

• highly efficient process which involves no loss of heat to the environment.

Which molecule is the energy-carrying molecule involved in the process of cellular respiration?

• carbon dioxide

• NAD+/NADH

• NADP+/NADPH

• oxygen

Adenosine triphosphate, or ATP, is primarily used as __________ in living organisms.

• a blood coagulant

• a source of energy

• a reproductive enzyme

• a muscle relaxing hormone

Which of the following are products in the process of photosynthesis?

• carbon dioxide and oxygen

• carbon dioxide and water

• glucose and oxygen

• glucose and water

During photosynthesis, plants capture light energy from the Sun to break the bonds in reactants, such as carbon dioxide and water, and form carbon-containing molecules, such as glucose.  The carbon-containing molecules can then be used

• to produce inorganic compounds, such as sulfuric acid.

• to assemble larger molecules, such as DNA, proteins, and fats.

• to synthesize essential amino acids.

• ALL OF THESE

A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time . Which statement best describes how these processes are related to each other?

• Both processes produce carbon dioxide

• Both processes require energy directly from the Sun.

• Products of one process are used as some of the reactants for the other process.

• Thermal energy from one process is used as the energy source for the other process.

LAB:  Do you have evidence that cellular respiration occurred in leaves?

• Yes, carbon dioxide was produced "in the dark." (positive slope)

• Yes, carbon dioxide was produced "in the light." (positive slope)

• No, carbon dioxide was consumed "in the dark." (negativeslope)

• No, carbon dioxide was consumed "in the light." (negative slope)