You carbohydratesare organic molecules formed mainly by the combination of atoms of carbon, hydrogen It is oxygen.
They can also be called sugars or glycides and are the main sources of energy for living beings.
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We prepared a list of exercises on carbohydrates so you can test your knowledge about these molecules.
See the template and save the list in PDF at the end of the post!
1) (UNIFOR) Striated muscle fibers store a carbohydrate from which energy for contraction is obtained. This reserve substance is in the form of:
a) Starch.
b) Glucose.
c) Maltose.
d) Sucrose.
i) Glycogen.
2) (Mackenzie) Substances which are intended to supply energy, in addition to being responsible for the rigidity of certain tissues, being more abundant in plants, are the ______________ synthesized in the process of ________________.
a) lipids, photosynthesis
3) (UERJ) Ordinary paper is formed, basically, by the most abundant polysaccharide on the planet. This carbohydrate, in plant cells, has the following function:
a) Coating the organelles.
b) Form the plasma membrane.
c) Compose the structure of the cell wall.
d) Accumulate energy reserve in the hyaloplasma.
4) (PUCCamp) Our diet is quite balanced in terms of proteins, carbohydrates and fats, but leaves something to be desired in terms of micronutrients and vitamins. “Brazilians consume 400 milligrams of calcium a day, when the international recommendation is 1,200 milligrams,” (…). It is a cultural problem, more than a socioeconomic one, since the most affluent, from classes A and B, ingest about half of the calcium they should. Revista Pesquisa Fapesp, June 2010, p. 56.
Glucose and sucrose are carbohydrates which, through total thermal decomposition, produce:
a) methane and water.
b) carbon and water.
c) carbon and the gases hydrogen and oxygen.
d) carbon monoxide and water.
e) carbon dioxide and water.
5) (UFRRJ) Plants and animals use several chemical components in the formation of important parts of their organisms or in the construction of important structures in their survival. A few are mentioned below:
I – The external skeleton of insects is composed of a polysaccharide.
II – Plant cells have a wall formed by polypeptides.
III – The honeycombs of hives are made up of lipids.
IV – Nails are impregnated with polysaccharides that make them rigid and waterproof.
The statements are correct
a) I and II.
b) I and III.
c) I and IV.
d) II and III.
e) II and IV.
6) (UDESC) In the chemical composition of cells, an extremely important constituent is glycides, also called sugars or carbohydrates.
Analyze the propositions with respect to these molecules.
i. Some are the primary source of energy for cells, and others act as a reserve of this energy.
II. Some carbohydrates are important for the formation of nucleic acids.
III. Examples of these molecules include glucose, starch, glycogen and cellulose.
IV. In addition to an energetic function, they may have a structural role in some cells.
a) Only statements I, II and III are true.
b) Only statements I and III are true.
c) Only statements II and IV are true.
d) Only statements III and IV are true.
e) All statements are true.
7) (UERN) Ribose and deoxyribose are the structural components of nucleic acids and examples of monosaccharides that make up DNA and RNA molecules. The name given to monosaccharides refers to the number of carbon atoms in the molecule. Thus, ribose and deoxyribose are monosaccharides made up of how many carbon atoms in their molecules?
a) 3.
b) 5.
c) 6.
d) 7.
8) We can classify carbohydrates into three main groups: monosaccharides, disaccharides and polysaccharides. Mark the alternative where we find only carbohydrates formed by the union of two monosaccharides.
a) starch and cellulose.
b) sucrose and cellulose.
c) fructose and glucose.
d) cellulose and glycogen.
e) sucrose and lactose.
9) (UEMA) Carbohydrates are the main sources of daily energy for humans and are classified into monosaccharides, oligosaccharides and polysaccharides, according to the size of the molecule. Polysaccharides are glucose polymers fundamentally made up of carbon, hydrogen and oxygen atoms that perform several essential functions for the proper functioning of the organism. The best known polysaccharides are glycogen, cellulose, starch and chitin.
The functions attributed to these molecules are, respectively:
a) structural, reserve, structural, reserve.
b) reserve, reserve, structural, structural.
c) reserve, structural, reserve, structural.
d) structural, structural, reserve, reserve.
e) reserve, structural, structural, reserve.
10) We know that starch is an important reserve substance found in plants and some algae. Mark the correct alternative regarding starch.
a) Starch is not a carbohydrate.
b) Starch is a disaccharide, as is fructose.
c) Starch is a monosaccharide, just like glucose.
d) Starch is a polysaccharide, as are glycogen and cellulose.
1 and
2 — and
3 — c
4 — c
5 — b
6 — and
7 — b
8 — and
9 — c
10 — d
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