Answer:
For 4.) The lighter outer part of a shadow is called the penumbra. Hope this helps ^_^
Answer:
The correct answer is the D option 5' A C G U U A G G 3'
Explanation:
The chemical ending orientation of a single strand of nucleic acid into a single strand of DNA or RNA is the chemical convention of naming carbon atoms in the nucleotide sugar-ring,
It means that there will be a 5′-end (usually pronounced "five prime end" ), which frequently contains a phosphate group attached to the 5′ carbon of the ribose ring, and a 3′-end (usually pronounced "three prime end"), which typically is unmodified from the ribose -OH substituent.
Answer:
The amount of target DNA segments doubles with each cycle of PCR.
Explanation:
A polymerase chain reaction is an in vitro technique that is performed in the labs to replicate the DNA from a very small amount of DNA sample. The DNA sample is replicated or double in a very small amount of time that is the target sample doubles after each cycle.
The PCR technique is based on the DNA replication mechanism and thus employs the primer, A Taq DNA polymerase enzyme and the adequate amount of temperature.
Thus, the selected option is correct.
The methicillin-resistant form of the bacterium commonly known as staph was first identified in the 1970's in hospitals, but it has since spread across the world, showing up in day cares, schools and other public spaces. Today, 1.2 million MRSA infections occur in hospitals in the U.S. and invasive MRSA kills over 19,000 per year,However, In the past, penicillin was used to treat Staphylococcus aureus infections. Shortly after, S. aureus became resistant to penicillin. During the 1950s, derivatives of penicillin was discovered by pharmaceutical companies that could treat Staphylococcus aureus . The graph below depicts the Spread of Antibiotic-Resistant S. aureus Infections in the United States. Separate curves are shown for bacteria that caused infections in the hospital ("Hospital-Acquired") and in healthy people in the community ("Community-Acquired").
information found at https://www.biologycorner.com/worksheets/case_study_bacteria_resistance.html
Generally all living organisms do have cell membranes, except viruses (this is still a controversial topic). I hope this helps :)
