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Molecular biology – the study of biology and biological functions Quiz

Molecular biology – the study of biology and biological functions Quiz

Molecular biology – the study of biology and biological functions Quiz Test

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Quiz Questions And Answers

Which of the following types of molecules provides building blocks for tissues, transports other molecules, and helps to regulate certain reactions in the human body?

Lipids
Fats
Carbohydrates
Protiens

Which of the following types of molecules has the primary function of providing a rapidly available energy source for living things?

Proteins
Carbohydrates
Fats/Lipids

How does a saturated lipid differ from a polyunsaturated one?

A saturated lipid is made up only of carbon atoms.
A saturated lipid contains the maximum number of hydrogen atoms.
A saturated lipid is covalently bonded to a protein molecule.

What determines the sequence and arrangement of amino acids in a protein?

The number of available atoms in an organism.
The number of hydrogen atoms in fatty acids.
The ration of carbon, hydrogen, and oxygen atoms in carbohydrates.
The information stored and translated by nucleic acids.

Which of these terms describes the ability of an organism to maintain a relatively constant internal temperature?

Osmosis
Metabolism
Homeostasis

What type of cellular transport requires a cell to use energy?

Facilitated diffusion
Active transport
Osmosis

In which type of cellular transport do molecules bind to channel proteins in order to move across a selectively permeable membrane against a concentration gradient?

Facilitated transport
Active transport
Diffusion

How are enzymes able to speed up biochemical reactions?

They provide energy to the reactants.
They absorb energy from the products.
They lower the activation energy of the reaction.

Which of the following occurs during a biochemical reaction?

Reactant atoms are destroyed and product atoms are formed.
Bonds of reactants are broken and atoms are rearranged into products.
Energy from the cell is converted into atoms of the products.

What happens to a pair of molecules that collide with less than the activation energy?

They repel each other without being changed.
They react but at a slower rate than particles with more energy.
They stick together until they absorb enough energy to react.
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