Carbohydrates and Lipids assignment and quiz

Which molecule can cells convert to steroids?

A

Which of these is a carbohydrate? C6H12O6 C6H6O12 C6H13O2N C3H6O2NS

C6H12O6

Typical monosaccharides have the form Cx(HO)y. Cx(H2O)y. HCx(O)y. Hx(CO)y.

Cx(H2O)y.

Explain the importance of carbohydrates and lipids in the human body. Include a discussion of at least two functions of carbohydrates and the roles of two groups of lipids.

Did your response contain the following points? You may have discussed additional points that are not listed here. Both carbohydrate and fat molecules release energy when cells break them down. Many carbohydrates contain fiber, which the body cannot break down but which can help the digestive system function. Sterols are important lipids that cells can convert into compounds the body needs, such as vitamins, some hormones, and bile salts. Phospholipids are important structural components of cells.

? are formed by the combination of two ?

Disaccharide Monosaccharide

Which type of fat is a solid at room temperature and does not have double bonds between carbon atoms? Triglycerides are made from an ester of glycerol and... ? are important building blocks of fats.

Saturated fat fatty acids Fatty acids

Which statement about phospholipids is true? Heads of phospholipids are hydrophobic. Phospholipids allow any particle to freely pass through the phospholipid bilayer. Tails of phospholipids are hydrophobic. Phospholipids do not allow small particles to freely pass through the phospholipid bilayer.

Tails of phospholipids are hydrophobic.

Which statement best describes a difference between saturated fats and unsaturated fats? Unsaturated fats tend to have higher melting points because they have only single carbon-carbon bonds, which allow the molecules to be straight. Unsaturated fats tend to have lower melting points because they have at least one carbon-carbon double bond, which causes the molecule to bend. Unsaturated fats tend to have lower melting points because they have only single carbon-carbon bonds, which allow the molecules to bend. Unsaturated fats tend to have higher melting points because they have at least one carbon-carbon double bond, which causes the molecule to be straight.

Unsaturated fats tend to have lower melting points because they have at least one carbon-carbon double bond, which causes the molecule to bend.

Which substance is mainly composed of a subgroup of lipids? beef butter soybean flour

butter

Which carbohydrate strengthens plant cells? glucose glycogen cellulose lactose

cellulose

Consider the sugar below. mc010-1.jpg Which term best describes this sugar? disaccharide monosaccharide polysaccharide saccharide

disaccharide

What carbohydrate is primarily used by the body to help the digestive system? fats fiber sugars sterols

fiber

How many carbon rings should you expect to find in a steroid? two three four five

four

Carbohydrates are combinations of which three types of atoms? hydrogen, lithium, and nitrogen hydrogen, oxygen, and carbon oxygen, helium, and carbon oxygen, nitrogen, and lithium

hydrogen, oxygen, and carbon

Which food is mainly made up of carbohydrates? beef lamb potato nuts

potato

Which type of lipid is found in the body and is converted into vitamins, hormones, and bile salts? fats waxes sterols phospholipids

sterols

Carbohydrates are important for living organisms because they store energy. release oxygen. provide fat. remove waste.

store energy.

Lipids include fats and water. oils and carbohydrates. waxes and sterols.

waxes and sterols.