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An ionic chemical bond is one in which   

According to Octet rule atoms of an element will tend to have 8 electrons in their 2nd shell.

The macromolecule that can serve as the primary source of energy: 

A protein will be positively charged when it contains excess of amino acids that have the following functional group in their R-chain:

Water is a polar molecule because the electronegativity of hydrogen is higher than that of oxygen and therefore the H-atoms develop a partial negative charge.

A solutions architect is designing an online shipping application running in a VPC on EC2 instances behind an ELB application load balancer.    Each EC2 instance accesses a database on a private subnet. The architect wants to ensure zone failure fault tolerance of the EC2 instances.  What must the architect do to ensure this?

Which AWS services is best used to store data that can be versioned and replicated automatically by the most cost effective means? 

Which of the following statements are true of horizontal scaling? Each correct answer represents a complete solution. Choose all that apply.

Christopher has been directed by his employer’s finance department that they cannot afford to lose any more than 30 minutes of data in the case of a database failure or other catastrophic event. Christopher has updated his corporate business continuity and disaster recovery plans. What metric did he change?

Mackenzie has created a set of load balanced web servers to support his company’s e-commerce business.  Each system has been assigned a security certificate using a public/private key encryption protocol to protect the integrity of transactions when customers enter their payment information.   Which encryption protocol is Mackenzie likely implementing?