Bio 1- Chapter 3

A. The enzymes required to digest cellulose are not produced in human body; undigested fiber adds bulk to the food easing bowel movements.

Fiber is not really a nutrient, because it passes through our body undigested. Why can't fiber be digested and why is it important to our diet? A. The enzymes required to digest cellulose are not produced in human body; undigested fiber adds bulk to the food easing bowel movements. B. The enzymes that digests cellulose cannot bind to the cellulose due to altered active sites; undigested fiber adds bulk to the food easing bowel movements. C. The enzymes required to digest cellulose are not produced in human body; fiber produces energy for the metabolism. D. Competitive inhibitors are not the reason that fiber is indigestible.

C. Tertiary

Mad cow disease is an infectious disease where one misfolded protein causes all other copies of the protein to being misfolding. This is an example of a disease impacting ____ structure. A. Primary B. Secondary C. Tertiary D. Quaternary

B. Saturated fats are solid at room temperature and unsaturated fats are liquid at room temperature Saturated fats are solid at room temperature unlike unsaturated fats.

What is a difference between saturated and unsaturated fats? A. Saturated fats have at least one double bond between carbon atoms but unsaturated fats have no double bonds. B. Saturated fats are solid at room temperature and unsaturated fats are liquid at room temperature C. Saturated fats are liquid at room temperature and unsaturated fats are solid at room temperature. D. Saturated fats are solid at room temperature and have at least one double bond unlike unsaturated fats.

C. phosphate

What is removed during the formation of nucleic acid polymers? A. carbon B. hydroxyl groups C. phosphate D. amino acids

B. microRNA

What is the smallest type of RNA? A. mRNA B. microRNA C. rRNA D. tRNA

C. Maltose

A bond between two glucose molecules creates what kind of molecule? A. galactose B. lactose C. Maltose D. Sucrose

B. Electrons are shared between atoms of the joined monomers.

Cells typically make all of their macromolecules from a set of 40-50 common monomers and a few other rare ingredients via dehydration (or condensation) reactions. Which of the following statements is true about dehydration reactions? A. One monomer gains a hydrogen atom, while the other loses a hydroxyl. B. Electrons are shared between atoms of the joined monomers. C. Water is destroyed as the monomers are joined. D. Ionic and hydrogen bonds are formed between the monomers.

C. Phosphates are removed from nucleic acids, but not polysaccharides.

How does the formation of nucleic acid polymers differ from the formation of polysaccharides? A. Carbon is removed from nucleic acids, but not polysaccharides. B. They differ in the presence of hydroxyl groups C. Phosphates are removed from nucleic acids, but not polysaccharides. D. They differ in whether or not water is removed

B. functional form of the protein

In most proteins, the tertiary level of its structure is the ____. A. last part of the structural development B. functional form of the protein C. level using an α helix and the β -pleated sheet D. level using straight-line linkages

C. the number of hydrogen atoms on the triglycerides

The difference between saturated and unsaturated fats lies in the ____. A. the number of fatty acids B. the length of the fatty acids C. the number of hydrogen atoms on the triglycerides D. the ester bonds between the fatty acids and glycerol

D. H+H+ and OH−OH− ions share electrons with the respective monomers in hydrolysis.

What role do electrons play in dehydration synthesis and hydrolysis? A. Sharing of electrons between monomers occurs in both dehydration synthesis and hydrolysis. B. The sharing of electrons between monomers occurs in hydrolysis only. C. H+H+ and OH−OH− ions share electrons with the respective monomers in dehydration synthesis. D. H+H+ and OH−OH− ions share electrons with the respective monomers in hydrolysis.

B. hormones Hormones carry the message throughout the body and further work as signal molecules to promote the required response.

What type of protein carries chemical messages through the body? A. enzymes B. hormones C. membrane transport proteins D. tRNA molecules

D. triglycerides Triglycerides, stored in adipose tissue, are a major form of energy storage in animals. Fat cells are designed for continuous synthesis and breakdown of triglycerides in animals.

Which fat serves as an animal's major form of energy storage? A. cholesterol B. glycerol C. phospholipid D. triglycerides

D. The sugar in RNA has one more oxygen than the sugar in DNA.

Which of the following statements about DNA and RNA is true? A. DNA and RNA are double stranded. B. DNA and RNA contain the nitrogenous bases adenine, guanine, cytosine, and thymine. C. The pentose sugar in DNA is ribose, and in RNA is deoxyribose. D. The sugar in RNA has one more oxygen than the sugar in DNA.

C. red blood cell Blood cells tend to travel all along the blood vessels of the body and therefore require flexibility to travel. The cholesterol embedded in their membrane provides them with the required flexibility.

Which type of body cell would have a higher amount of cholesterol in its membrane? A. cartilage cell B. liver cell C. red blood cell D. spleen cell