Biological Chemistry Questions

Fats containing polyunsaturated fatty acids have ______ melting points.A. highB. lowC. no

The framework or backbone of biological molecules consists predominantly of which of the following atoms?OxygenCarbonNitrogenHydrogen

When unsaturated fats are partially hydrogenated, this can produce double bonds with the ______ configuration, where the carbon chain is on opposites sides before and after the double bond.

Choose all that applyFrom the list below, select all that are polysaccharides.A. GlycogenB. StarchC. FructoseD. CholesterolE. ChitinF. Cellulose

The 4 main groups of biological macromolecules are nucleic acids, __________, __________, and ___________.

Which characteristic of a protein determines its function?ShapeMolecular formulaMolecular weightElectrical charge

The sequence of amino acids in a protein is specified by which of the following?A. The sequence of nucleotides in a segment of DNAB. The alternating sugar-phosphate groups in the DNA backboneC. Special protein-synthesizing enzymesD. The overall 3-dimensional shape of the protein

A fatty acid that has all the hydrogen atoms possible is said to be _________

How many polypeptides are present in a protein whose highest level of structure is tertiary structure?A. 1 polypeptide onlyB. 3 polypeptides that interact to form the proteinIt is impossible to determine from the information givenC. 2 polypeptides that interact to form the protein

Regarding polypeptides, the two basic types of ____________ structure are alpha _________ and beta-pleated sheet.

What are lipids?A. Lipids are hydrophilic molecules that usually lack nitrogen.B. Lipids are hydrophobic molecules composed primarily of hydrogen and carbon.C. Lipids are hydrophobic molecules that usually lack oxygen.D. Lipids are hydrophilic molecules composed primarily of hydrogen and carbon.E. Lipids are hydrophobic molecules composed primarily of carbon, hydrogen and nitrogen.

Select all that applyOf the following list, choose the functions of proteins in living cells.A. They carry genetic information from one generation to the next.B. They play a key role in moving materials within cells.C. They catalyze chemical reactions.D. They are the immediate source of energy for most cell activities.E. They transport oxygen in the blood of vertebrates.F. They help the body recognize and destroy foreign microbes and cancer cells.

A general (all-inclusive) term for organic molecules that have the same molecular formula, but that differ in their structure or in the spatial arrangement of their atoms, is ___________.

Functional units within the larger structure of a protein are called ______.A. amino acidsB. motifsC. domainsD. tertiary structure

Changes in a protein's environment can cause the protein to unfold and lose its shape in a process called which of the following?A. HydrolysisB. PolymerizationC. Hydrophobic exclusionD. DissociationE. Denaturation

Diseases caused by the improper folding of proteins may be due to deficiencies in __________ proteins.

Glucose and fructose can be described as which of the following?A. Structural isomersB. StereoisomersC. EnantiomersD. Isotopes

Choose all that apply:From the following list, choose all lipids.A. FatsB. TerpenesC. DNA and RNAD. OilsE. Polypeptides

Choose all that apply: Compared to an unsaturated fat, a saturated fat with the same number of carbon atoms will have which of the following?A. A higher melting pointB. More hydrogen atomsC. More double bonds

How can scientists use protein motifs?A. They can be used to predict the function of a proteinB. They can be used to determine if a protein has any domains (and how many)C. They can be used to determine how a protein folds in different conditions (pH, temperature, etc.)