Biology Questions and Answers

Biology Questions and Answers

Biochemistry

Introduction

1. What are the chemical
   elements that form most of
   living biological matter?

The chemical elements that form most

of the molecules ooxygen (O), carbon (C), f living hydrogen (H)beings are (^)
and nitrogen (N).

2. Living beings are made of
   organic and inorganic
   substances. According to the
   complexity of their molecules
   how can each of those
   substances be classified?

Inorganic sumineral salts,bstances, molecular oxy like water,gen and (^)
carbon dioxide, are small molecules
made of few atoms.in general, like glucose, f Organic substances,atty acids and
proteins, are much more complex
molecules macarbons bound in carbode of sequences ofn chains. T (^) he
capacity of carbon to form chains is one
of the main permitted the emergence of life on thechemical facts that (^)
planet.

3. What are the most
   important inorganic molecular
   substances for living beings?

The most important inorganic

substancesmineral salts, for living b carbon dioxide andeings are water,

molecular oxygen. (There are several

other inorganic substances withowhich cells would die.) ut

4. What are mineral salts?
   Where in living beings can
   mineral salts be found?

Mineral saltssubstances made of metallic are simple inorganic chemical (^)
elements, like irocalcium and magnesium, n, sodium, potassium,or of non-
metallic elements, like chlorine and
phosphorus.
They can be found in non-solubilized
form, as porganism, like art of structuresthe calcium in bones. of the (^)
They can also be found solubilized in
water, and potassiumas ions: for example, cations within cells.the sodium

5. What are the most
   important organic molecules
   for living beings?

There are many molecules that artypes oe important for thef organic (^)
living beings. Especially important areamino acids and proteins, carbohydrates (^)
(including glucose), lipids and nucleic
acids (DNA and RNA).
Biochemistry Introduction Review -
Image Diversity: amino acid molprotein molecule carbohydrate molececuleule (^)
lipid molecule nucleic acid molecule
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