(cell biology) The first period in the interphase wherein the cell primarily grows in cell size
Supplement
In eukaryotes, the cell cycle is a cyclical series of biological events that certain asexual cells go through. The cell cycle is comprised of these fundamental events: (1) resting phase (Gap 0), (2) interphase (Gap 1, S phase, Gap 2), and (3) cell division (i.e. mitotic phase and cytokinesis). The interphase is the period prior to cell division.
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Thus, it would entail two major events, particularly cell growth and DNA replication. The interphase is comprised of three stages: Gap 1 (G1), Synthesis phase (S phase), and Gap 2 (G2). During G1, the cell typically grows in cell size. It ends when the cell enters the S phase, which is the period when DNA is replicated. Thus, it is also during G1 phase when mRNA and proteins (histones) for DNA synthesis are produced.
In humans, the G1 phase occurs for about one third of the duration of the cell cycle, which is about 18 hours.1 Similar to other phases in the cell cycle, the G1 phase is influenced by limiting factors, e.g. temperature, nutrients, and space (for growth).
2. SYNTHESIS IMPORTANT FEATURES
Ribonucleic Acid Definition
noun
(uncountable), ribonucleic acids
ri·bo·nu·cle·ic ac·id, raɪboʊnjuːkliːɪk ˈæsɪd
A nucleic acid that is frequently single-stranded and folded onto itself, and composed of repeating nucleotide units of ribose sugar, phosphate group, and nitrogenous base
Abbreviation: RNA. Synonym: ribose nucleic acid.
Overview
A nucleic acid refers to any of the group of complex compounds made up of linear chains of monomeric nucleotides. Each nucleotide component, in turn, is made up of phosphoric acid, sugar, and nitrogenous base. Nucleic acids are involved in the preservation, replication, and expression of hereditary information. Two major types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Explanation:
Analysis #1. nucleus #2. plant metabolism #3.Mutagen definition - Any agent causing mutation is called mutagen. Mutagens can be physical mutagens, chemical mutagens, or biological mutagens. The ability of a substance to induce the alterations in the base pairs of DNA or mutation is known as mutagenicity.
DNA is the hereditary material of the living cell. DNA is a polynucleotide made up of a number of nucleotide units. These units, in turn, are made up of nitrogen-containing nucleobases (cytosine [C], guanine [G], adenine [A], or thymine [T]) that are covalently bonded with sugar (particularly, deoxyribose), and a phosphate group. The typical pattern of nucleic acid bases encodes all the genetic information of a cell. A mutagen alters the specific pattern and sequence of the nucleic acid bases in the DNA resulting in the change in the protein transcribed from it. Though these changes may be inheritable or non-inheritable depending on their occurrence in somatic cells or germline cells.
Some of the common examples of mutagens are- UV light, X-rays, reactive oxygen species, alkylating agents, base analogs, transposons, etc.
Answers & Comments
Answer:
1. GAP 1 PHASE
Definition
noun
(cell biology) The first period in the interphase wherein the cell primarily grows in cell size
Supplement
In eukaryotes, the cell cycle is a cyclical series of biological events that certain asexual cells go through. The cell cycle is comprised of these fundamental events: (1) resting phase (Gap 0), (2) interphase (Gap 1, S phase, Gap 2), and (3) cell division (i.e. mitotic phase and cytokinesis). The interphase is the period prior to cell division.
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Thus, it would entail two major events, particularly cell growth and DNA replication. The interphase is comprised of three stages: Gap 1 (G1), Synthesis phase (S phase), and Gap 2 (G2). During G1, the cell typically grows in cell size. It ends when the cell enters the S phase, which is the period when DNA is replicated. Thus, it is also during G1 phase when mRNA and proteins (histones) for DNA synthesis are produced.
In humans, the G1 phase occurs for about one third of the duration of the cell cycle, which is about 18 hours.1 Similar to other phases in the cell cycle, the G1 phase is influenced by limiting factors, e.g. temperature, nutrients, and space (for growth).
2. SYNTHESIS IMPORTANT FEATURES
Ribonucleic Acid Definition
noun
(uncountable), ribonucleic acids
ri·bo·nu·cle·ic ac·id, raɪboʊnjuːkliːɪk ˈæsɪd
A nucleic acid that is frequently single-stranded and folded onto itself, and composed of repeating nucleotide units of ribose sugar, phosphate group, and nitrogenous base
Abbreviation: RNA. Synonym: ribose nucleic acid.
Overview
A nucleic acid refers to any of the group of complex compounds made up of linear chains of monomeric nucleotides. Each nucleotide component, in turn, is made up of phosphoric acid, sugar, and nitrogenous base. Nucleic acids are involved in the preservation, replication, and expression of hereditary information. Two major types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Explanation:
Analysis #1. nucleus #2. plant metabolism #3.Mutagen definition - Any agent causing mutation is called mutagen. Mutagens can be physical mutagens, chemical mutagens, or biological mutagens. The ability of a substance to induce the alterations in the base pairs of DNA or mutation is known as mutagenicity.
DNA is the hereditary material of the living cell. DNA is a polynucleotide made up of a number of nucleotide units. These units, in turn, are made up of nitrogen-containing nucleobases (cytosine [C], guanine [G], adenine [A], or thymine [T]) that are covalently bonded with sugar (particularly, deoxyribose), and a phosphate group. The typical pattern of nucleic acid bases encodes all the genetic information of a cell. A mutagen alters the specific pattern and sequence of the nucleic acid bases in the DNA resulting in the change in the protein transcribed from it. Though these changes may be inheritable or non-inheritable depending on their occurrence in somatic cells or germline cells.
Some of the common examples of mutagens are- UV light, X-rays, reactive oxygen species, alkylating agents, base analogs, transposons, etc.