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Questions and Answers
In passive diffusion, how do molecules move?
In passive diffusion, how do molecules move?
- From a region of lower concentration to higher concentration
- From a region of higher concentration to lower concentration (correct)
- Against the concentration gradient
- By active transport across a selectively permeable membrane
Which transport mechanism requires a large concentration gradient for adequate nutrient uptake?
Which transport mechanism requires a large concentration gradient for adequate nutrient uptake?
- Gram-positive cell wall transport
- Active transport (correct)
- Gram-negative cell wall transport
- Facilitated diffusion
What is a key feature of facilitated diffusion?
What is a key feature of facilitated diffusion?
- Movement from lower to higher concentration
- Requires energy input
- Uses protein channels or carriers (correct)
- Movement against the concentration gradient
Which type of transport mechanism is crucial for nutrient uptake in microorganisms?
Which type of transport mechanism is crucial for nutrient uptake in microorganisms?
What differentiates active transport from passive diffusion?
What differentiates active transport from passive diffusion?
How do microorganisms primarily take in dissolved particles?
How do microorganisms primarily take in dissolved particles?
What is the main difference between macronutrients and trace elements?
What is the main difference between macronutrients and trace elements?
Which of the following best describes facilitated diffusion?
Which of the following best describes facilitated diffusion?
How do Gram-positive and Gram-negative cell walls differ?
How do Gram-positive and Gram-negative cell walls differ?
What is the primary function of active transport in bacterial cells?
What is the primary function of active transport in bacterial cells?
What is the structure responsible for providing rigidity to bacterial cell walls?
What is the structure responsible for providing rigidity to bacterial cell walls?
Which process involves the simultaneous transport and chemical modification of substances as they cross the plasma membrane?
Which process involves the simultaneous transport and chemical modification of substances as they cross the plasma membrane?
What type of transport is characterized as not being energy-dependent?
What type of transport is characterized as not being energy-dependent?
Which substances can easily cross the plasma membrane via passive diffusion?
Which substances can easily cross the plasma membrane via passive diffusion?
In what direction does the movement occur in active transport?
In what direction does the movement occur in active transport?
Which cell wall component contributes significantly to protecting bacterial cells from osmotic stress and toxic materials?
Which cell wall component contributes significantly to protecting bacterial cells from osmotic stress and toxic materials?
Which type of bacteria has a thicker peptidoglycan layer: Gram-positive or Gram-negative?
Which type of bacteria has a thicker peptidoglycan layer: Gram-positive or Gram-negative?
What type of proteins help facilitate substances passing through the plasma membrane by forming pores?
What type of proteins help facilitate substances passing through the plasma membrane by forming pores?
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