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Rio Salado Bio 205 Midterm Questions and Answers Graded A+ What is the primary function of the mitochondria in a cell? The primary function of the mitochondria is to produce ATP, which provides energy for cellular activities. How do enzymes affect the rate of biochemical reactions? En...

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Rio Salado Bio 205 Midterm Questions
and Answers Graded A+
What is the primary function of the mitochondria in a cell?


✔✔ The primary function of the mitochondria is to produce ATP, which provides energy for

cellular activities.




How do enzymes affect the rate of biochemical reactions?


✔✔ Enzymes increase the rate of biochemical reactions by lowering the activation energy

required for the reaction to proceed.




What is the role of ribosomes in a cell?


✔✔ Ribosomes are responsible for synthesizing proteins by translating messenger RNA

(mRNA) into amino acid sequences.




What is the central dogma of molecular biology?


✔✔ The central dogma of molecular biology describes the flow of genetic information from

DNA to RNA to protein.




1

,How does diffusion differ from active transport in terms of energy use?


✔✔ Diffusion does not require energy as it moves molecules from an area of higher

concentration to an area of lower concentration, while active transport requires energy to move

molecules against their concentration gradient.




What is the purpose of cellular respiration?


✔✔ The purpose of cellular respiration is to convert biochemical energy from nutrients into

ATP, releasing waste products such as carbon dioxide and water.




What are the main stages of the cell cycle?


✔✔ The main stages of the cell cycle are interphase (including G1, S, and G2 phases) and

mitosis (including prophase, metaphase, anaphase, and telophase), followed by cytokinesis.




What is the difference between prokaryotic and eukaryotic cells?


✔✔ Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells

have a nucleus and various membrane-bound organelles.




How does the structure of DNA relate to its function?




2

, ✔✔ The double-helix structure of DNA allows it to store genetic information efficiently and

replicate accurately during cell division.




What is the role of the endoplasmic reticulum in a cell?


✔✔ The endoplasmic reticulum is involved in the synthesis of proteins and lipids, and in the

transport of materials within the cell.




What is the function of the Golgi apparatus in a cell?


✔✔ The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or

delivery to other organelles.




What is the significance of the fluid mosaic model in understanding cell membranes?


✔✔ The fluid mosaic model describes the cell membrane as a flexible structure with a mosaic of

proteins floating in or on the fluid lipid bilayer, which allows for dynamic movement and

function.




How do cellular junctions contribute to tissue function?


✔✔ Cellular junctions help maintain the structural integrity of tissues by anchoring cells

together, facilitating communication, and regulating the movement of substances between cells.


3

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