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Chapter 9-Bio 114 Study Questions and Correct Answers
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Metabolism: Sum total of all reactions in a cell Reactions are organized into reaction sequences - metabolic pathways All reactions in cells catalyzed by enzymes Each pathway has a specific Function Begins with a specific molecule and ends with a specific product is the sum total of catabolic an...

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  • August 9, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • chapter 9 bio 114 study questions and correct answ
  • metabolism sum total of all reactions in a cell
  • all reactions in cells catalyzed by enzymes

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Chapter 9-Bio 114 Study Questions and
Correct Answers
Metabolism: ✅Sum total of all reactions in a cell
Reactions are organized into reaction sequences - metabolic pathways

All reactions in cells catalyzed by enzymes

Each pathway has a specific Function
Begins with a specific molecule and ends with a specific product

is the sum total of catabolic and anabolic processes in the cell

Cellular Processess: ✅A cell is a chemical factory where thousands of reactions take
place

The cell extract energy and uses the energy to perform work

Some organisms even convert energy to light, as in bioluminescence

Catabolic processes (5): ✅(1) Oxidative
(2) Energy forming
(3) Converging partten
(4) Increased disorder
(5) Break down few larger molecules to few smaller ones

Anabolic processes (5): ✅(1) Reductive
(2) Diverging,
(3) Energy requiring
(4) Decreased disorder
(5) Build up a few small molecules into many different larger molecules

Location/Stages in Metabolism: ✅Outside and inside the cell-No energy produced

Cytoplasm-Little energy produced, 2 ATP's

Mitochondria-Most of the energy produced

Three kinds of work done by a cell: ✅Mechanical
Transport
Chemical

ATP powers cellular work

, ATP- Energy Currency in Cells: ✅ATP connects catabolic and anabolic process

ATP (adenosine triphosphate) is the cell's energy shuttle (currency)

ATP provides energy for cellular Functions
Phosphate groups of ATP's tail can be hydrolyzed to release energy

Exergonic reaction: ✅Proceeds with a net release of energy and is Spontaneous

-G is negative

-In the cell, the energy from exergonic reaction of ATP hydrolysis can be used to drive
an endergonic reaction

Endergonic reaction: ✅Requires free energy from its surroundings and non-
spontaneous

-G is positive

Cellular respiration: ✅Set of metabolic reactions and processes that take place in cells
to convert biochemical energy from organic molecules to ATP and release waste
products.

-forms ATP
-ATP is a renewable resource that needs to be regenerated

Mitochondrion: ✅important site of cellular respiration
-intermembrane space and the matrix

Energy flow and chemical recycling in ecosystems: ✅Waste product of cellular
respiration (CO2) is used in photosynthesis.

Takes place in Chloroplasts

Carbon in organic molecules is fixed by photosynthesis

O2 is a waste product (used in respiration)
Elements cycle, but energy flows one way


In photosynthesis the waste product is oxygen
...which is then utilised by humans

In contrast resperiation produces CO2
...which is unitilized in plants

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