The genetic code carried by macromolecules is called?
DNA
Chromosomes
Nucleotides
RNA
The Correct Answer is A
DNA is a double-stranded macromolecule made up of nucleotides that carry genetic information. The sequence of nucleotides in DNA determines the genetic code, which controls the development and function of living organisms. Chromosomes are structures made up of DNA and proteins that carry genes. Nucleotides are the building blocks of DNA and RNA. RNA, on the other hand, is a single-stranded macromolecule that plays a key role in protein synthesis by carrying genetic information from DNA to ribosomes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Blood then carries them to target cells or organs throughout the body. Hormones are chemical messengers that help to regulate various physiological processes such as growth, metabolism, and reproduction. Unlike exocrine glands (option a), which secrete their products into ducts that carry them to external surfaces such as the skin or digestive tract, endocrine glands have no ducts and release their secretions directly into the circulatory system. Salivary glands (option d) are exocrine glands that secrete saliva into ducts leading to the mouth. Option b is also incorrect as it does not accurately describe endocrine glands.
Correct Answer is B
Explanation
When the sympathetic nervous system is stimulated, it activates the "fight or flight" response, which prepares the body for physical activity or stressful situations. This response includes several physiological changes, such as:
Increased heart rate and cardiac output: The sympathetic nervous system releases adrenaline and noradrenaline, which increase heart rate and cardiac output to provide more oxygen and nutrients to the muscles.
Decreased uterine activity: The sympathetic nervous system inhibits uterine contractions to prevent
premature labor.
Decreased pancreatic activity: The sympathetic nervous system inhibits insulin secretion and promotes glucagon secretion to increase blood glucose levels.
Decreased gastrointestinal activity: The sympathetic nervous system inhibits digestive functions to divert blood flow to the muscles.
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