BIO 141 EXAM 1 STUDY actual QUESTIONS SOLVED

BIO 141 EXAM 1 STUDY actual / QUESTIONS SOLVED CORRECTLY & verified /GRADED A+

What happens if a cell fails to pass a cell cycle checkpoint? - - ----Answers---Cells that don't pass restriction points die

How many chromosomes are there in a normal human cell?How can you tell if these are chromosomes from a male or female? - -----Answers---23 pairs of chromosomes, the 23 pairs - the sex cell differentiates male and female

What distinguishes a stem cell from a differentiated cell? - ---

--Answers---A stem cell:

Undifferentiated cell Can divide to yield two daughter stem cells and a progenitor cell

Differentiated cell:

Specialized cell

What is apoptosis? - -----Answers---Programmed cell death

Magnesium is ____ of the enzyme. - -----Answers---cofactor

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What do you expect the optimal temperature is for the nexokinase? - -----Answers---Body Temperature 98 degrees

The breakdown of glucose into smaller molecules is an example of catabolic or anabolic pathways? - -----Answers-- -catabolic

What does the term catalyst mean? - -----Answers---The acceleration of a chemical reaction

What are three unique properties of enzymes that make enzyme catalyzed reactions? - -----Answers---Temperature, pH, and pressure

What does oxidation mean? - -----Answers---Removal of electrons; opposite of reduction

Does glycolysis require oxygen? Does is generate CO2? - ----- Answers---Glycolysis does not generate O2 and it does not generate CO2

Where does glycolysis occur? - -----Answers---Cytoplasm

What is the high energy molecule that is commonly used for the energy in the cell? - -----Answers---ATP

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How are these high energy electrons used to generate ATP? - -----Answers---Electrons donated by NADH are transported through a chain of proteins

Linked to ATP synthesis

O2 is consumed in making H20

Enzyme catalyse - -----Answers---Speeds up a reaction Specific for substrate Capable of regulation

What are two common characteristics of epithelial cells? - --- --Answers---Tightly packed cells; adhere to each other

What are three common functions of epithelial? - ----- Answers---1. Protect the tissues beneath it from radiation, bacteria, desiccation, toxins, and physical trauma

• Regulation and exchange of chemicals between the

underlying tissues in the body cavity

• Secrete hormones (sweat, mucus, enzymes)
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