BIOLOGY HIGH SCHOOL

Pieces of DNA left at a crime scene can be multiplied by usinga. PCR.
b. gel electrophoresis.
c. an electrical current.
d. whole animal cloning.

Answers

Answer 1
Answer:


The answer is A .

PCR stands for Polymerase Chain Reaction. It is a method to analyze a short sequence of DNA or RNA and is used to reproduce (amplify) selected sections of the nucleic acid.  Untold numbers of copies can be made of the DNA in just a few hours.

 PCR amplifies the regions of DNA that it targets and can therefore be used to analyze extremely small amounts of sample. This is often critical for forensic analysis, when only a trace amount of DNA is available as evidence.



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Which type of molecule carries the genetic information that determines an organism's physical characteristics? a. RNA b. DNA c. protein d. carbohydrate

Answers

Answer:

b. DNA

Explanation:

DNA carries the genetic information that determines an organism's physical characteristics. DNA is a double-stranded molecule composed of nucleotides, and it contains the instructions for building and maintaining an organism. It serves as a blueprint for the synthesis of proteins, which are responsible for the physical characteristics and functioning of an organism. RNA plays a role in protein synthesis but does not carry the complete genetic information. Proteins and carbohydrates are important molecules in biological systems, but they do not directly carry the genetic information.

Final answer:

DNA is the molecule that carries the genetic information determining an organism's physical characteristics. It acts as a blueprint guiding organisms' growth, development, and reproduction.

Explanation:

The type of molecule that carries the genetic information that determines an organism's physical characteristics is DNA. DNA, which stands for deoxyribonucleic acid, is found in the cells of all living organisms and it serves as a guide for their growth, development, functioning and reproduction. While the other options you mentioned - RNA, Proteins, and Carbohydrates - all play important roles in biological processes, it is DNA that holds the genetic blueprint that gives each organism its unique traits.

Learn more about DNA here:

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20 POINTS!!! Help!!! Conditions under which natural selection occurs in a population of tortoises are described in the table below: Natural Selection Description Condition Description A The population comprises smaller adult tortoises and larger adult tortoise B Food is scarce on the island where the population is present Which factor contributes to natural selection for each condition? Condition A and Condition B represent competition. Condition A and Condition B represent inherited variation. Condition A represents competition, and Condition B represents inherited variation. Condition A represents inherited variation, and Condition B represents competition.

Answers