Biol 3140 Study Guide - Iowa State University

Biology

Which Statement Represents Cell Theory?

All cells are formed by the growth and division of existing cells

In Which of the Following Organelles Does Transcription Occur?

Both mitochondrion and nucleus

If You Wanted to Study the Detailed Internal Membrane Structure of a Chloroplast, What Kind of Microscopy Would be Most Appropriate?

Electron

Knowledge Gained from the Study of Zebrafish Can Potentially Contribute to Understanding Human Biology

True

Which Four Elements Make Up 96% of the Weight of Living Organisms?

Carbon, hydrogen, nitrogen, and oxygen

Atoms Form Covalent Bonds with Each Other By

Sharing electrons

In Water, Hydrogen Bonds Can Form Between Which of the Following?

A hydrogen atom of one water molecule and an oxygen atom of another

A Condensation Reaction Involves the Cleavage of a Covalent Bond by the Addition of a Water Molecule

False

Fatty Acids are Used as a Building Block for Which of the Following Macromolecules?

Membrane lipids

For a Reaction to Occur Spontaneously

• Free energy must be released

• Products have a lower energy than reactants

• The reaction is energetically favorable

• Change of G is negative

Consider the Following Peptide: Met-Ile-Leu-Ala-Phe-Ile-Val-Leu; Overall, This Peptide is Likely to be

Hydrophobic and uncharged

Hydrophobic Interactions Help Proteins Fold into Compact Conformations. The Fold Protein Shown Here is Likely to be Found in Which of the Cellular Compartments?

Cytosol

By What Mechanism(s) Can an Enzyme Lower the Activation Energy of a Reaction?

• Positioning of substrates to favor the reaction

• Straining bonds within the bound substrate

• Rearrangement of electrons in the substrate

• Formation of covalent bond between substrate and enzyme

Which Technique Would be Most Appropriate for the Purification of a Protein Base on its Charge?

Ion exchange chromatography

Regulation of Proteins Typically Involves Conformational Change in the Protein Structure

True

Allosteric Regulation of Enzymes Requires Binding of a Regulatory Molecule to the Active Site

False

Based on the Following Model, Which of the Following Statements is Not True?

Product Z can inhibit the production of product C

Which of the Following Techniques Can Help Determine Protein Tertiary and Quaternary Structures?

Cryo-electron microscopy