_________ is the division of the nucleus and DNA during cell division.
Cytokinesis
Transcription
Interphase
Mitosis
Translation
The Correct Answer is D
A. Cytokinesis: Cytokinesis is the process where the cytoplasm divides after mitosis, resulting in two separate daughter cells. It follows nuclear division but is not the division of the nucleus and DNA itself.
B. Transcription: Transcription is the process of copying genetic information from DNA into messenger RNA (mRNA). It is part of protein synthesis, not cell division.
C. Interphase: Interphase is the phase of the cell cycle where the cell grows, performs normal functions, and duplicates its DNA in preparation for division. However, it is not the stage where the nucleus and DNA actually divide.
D. Mitosis: Mitosis is the process of nuclear division where replicated chromosomes are separated into two nuclei. This ensures that each daughter cell receives an identical set of genetic material.
E. Translation: Translation is the process where ribosomes synthesize proteins using mRNA as a template. It occurs in protein production, not during nuclear or DNA division.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. Melanocytes:Melanocytes are specialized cells that produce melanin to protect against UV radiation. They do not function as sensory receptors and are not involved in touch sensation.
B. Keratinocytes:Keratinocytes form the majority of the epidermis and provide a protective barrier. While they interact with other skin cells, they do not detect sensory stimuli.
C. Adipocytes:Adipocytes are fat cells located in the subcutaneous layer. They serve as energy storage and insulation but are not involved in sensing touch.
D. Dendritic cells:Dendritic cells are immune cells in the skin that detect pathogens and present antigens. They play a role in immune defense rather than tactile sensation.
E. Tactile cells:Tactile cells, also known as Merkel cells, are specialized mechanoreceptors located in the basal layer of the epidermis. They detect light touch and pressure, transmitting sensory information to sensory neurons.
Correct Answer is A
Explanation
True:White fat primarily stores energy and provides thermal insulation, cushioning organs and helping regulate body temperature. Brown fat, rich in mitochondria, generates heat by burning lipids through non-shivering thermogenesis, especially important in infants and during cold exposure.
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