Share Biology 2nd midterm
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Which molecule is essential for all living things and makes up about 70% of the human body?
Water
Which property of water allows it to dissolve many substances?
Polarity
Which property allows water molecules to attract each other?
Cohesion
Which property allows water to stick to other surfaces?
Adhesion
Which biomolecules are the main source of energy for the body?
Carbohydrates
Which biomolecules are used to store long-term energy and form cell membranes?
Lipids
Which biomolecules are made up of amino acids and are essential for cellular structure and functions?
Proteins
Which nutrients are needed in small amounts but are essential for health?
Vitamins
A balanced diet should include:
Carbohydrates, proteins, fats, vitamins, minerals, and water.
The three postulates of the cell theory are:
Todos los seres vivos están formados por células; la célula es la unidad básica de la vida; toda célula proviene de otra célula.
Cells that do not have a nucleus are called...
prokaryotic cells.
Cells that do have a nucleus and organelles are called ...
eukaryotic cells.
Mention one difference between animal and plant cells.
Plant cells have a cell wall and chloroplasts; animal cells do not.
Which organelles have a double membrane?
Nucleous, mitochondrias y chloroplasts
Which organelles have a single membrane?
Lysosomes, vacuoles, endoplasmic reticulum, and Golgi apparatus.
Which structures do not have a membrane?
Ribosomes, centrioles
