The CRISPR-Cas System Helps Some Prokaryotes Defend Against Infection by Viruses

question 7

Multiple Choice

The CRISPR-Cas system helps some prokaryotes defend against infection by viruses. Which of the following statements correctly describes how this system works?

• A) it produces RNA that is translated into proteins that attack viral DNA
• B) it inserts specific genes into the prokaryotic genome
• C) it causes proteins to synthesize proteins that are then secreted by the prokaryote and attack viruses
• D) it cuts DNA at specific sequences to which it is directed

Recognize the tax advantages of certain bonds, specifically municipal versus corporate bonds.

Understand the quoting conventions for Treasury bonds and how to calculate purchase and selling prices.

Assess the impact of interest rate volatility on bond preferences and the factors affecting bond investment decisions.

Master the concept of yield to maturity (YTM) and yield to call (YTC) and their determinants.

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Definitions:

Lewis Structure

A diagram showing the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Tert-Butyl Alcohol

An organic compound with the formula (CH3)3COH, used as a solvent and in the preparation of other compounds.

Non-Bonding Lone Pairs

Pairs of valence electrons on an atom that are not involved in chemical bonding but influence the molecule's geometry and physical properties.

Covalent Bonds

Chemical bonds formed by the sharing of electron pairs between atoms, contributing to the stability and structure of molecules.