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Anit [1.1K]
3 years ago
12

Which is a point mutation?

Biology
2 answers:
geniusboy [140]3 years ago
6 0

Answer:

A mutation is a change or group of changes that occur in the genetic material of an organism. A point mutation is a type of mutation where a single nucleotide base is changed, inserted or deleted from DNA or RNA sequence. Point mutation occurs due to DNA replication, exposure to radiations like UV and X-rays, extreme heat and chemicals.

zloy xaker [14]3 years ago
3 0
A mutation that causes a single nucleotide base change, insertion, or deletion of the  genetic material, that indicate DNA or RNA .

 Hope this helped :)
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____ is a type of weathering where rock is dissolved by an acid.
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This Would be B

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Oxidation is something that dissolves rock.

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3 years ago
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Identification of key microRNAs and the underlying molecular mechanism in spinal cord ischemia-reperfusion injury in rats
alexdok [17]

The underlying molecular processes for 19 important DE miRNAs in the etiology of SCII were confirmed. The DE miRNAs could serve as potential intervention targets for SCII. Additionally, blocking microRNAs-3568 reduced apoptosis and preserved hind limb function after SCII, possibly via modulating GATA6, GATA4, and RBPJ in SCII.

microRNAs:

  • Short non-coding RNAs called miRNAs (microRNAs) control post-transcriptional gene expression.
  • SCII (spinal cord ischemia-reperfusion damage) is a medical condition that can lead to paralysis and paraplegia, among other serious effects. The development of SCII is influenced by aberrant microRNAs expression. Different microRNAs expression results could be caused by variations in the experimenters, filtering circumstances, control choice, and sequencing platform.
  • The purpose of this study is to investigate the important differently expressed microRNAs (DE miRNAs) and the underlying molecular mechanism in SCII by methodically analyzing the available SCII microRNAs expression data. A thorough bioinformatics study of 23 representative rat SCII miRNA datasets from PubMed was carried out. On mi RDB, the target genes of important DE miRNAs were predicted.
  • Functional enrichment and transcription factor binding analyses using the DAVID and T Fact S databases. Nine were increased (miR-144-3p, miR-3568, miR-204, miR-30c, miR-34c-3p, miR-155-3p, miR-200b, miR-463, and miR-760-5p) and ten were downregulated (this study found 19 important DE miRNAs involved in SCII) (miR-28-5p, miR-21-5p, miR-702-3p, miR-291a-3p, miR-199a-3p, miR-352, miR-743b-3p, miR-125b-2-3p, miR-129-1-3p, and miR-136).Target genes of the increased DE miRNAs underwent KEGG enrichment analysis, which identified the pathways primarily involved as being the cGMP-PKG and cAMP signaling pathways. According to KEGG enrichment analysis of the downregulated DE miRNAs' target genes, the main signaling pathways involved were the Chemokine and MAPK signaling pathways. The target genes of the increased DE miRNAs were clearly enriched in biological processes such brain development and the positive control of transcription from RNA polymerase II promoter, according to GO enrichment analysis.
  • The majority of the target genes of the downregulated DE miRNAs were enriched in biological processes such intracellular signal transmission and the inhibition of cell growth. The transcription factor study revealed that the four transcription factors, SP1, GLI1, GLI2, and FOXO3, had significant regulatory effects on the main DE miRNAs' target genes. MiR-3568 stood out among the elevated DE miRNAs as being particularly intriguing. SCII results in significant neurological deficiencies in the lower extremities, but miR-3568 anti-miRNA oligonucleotides (AMOs) enhance neurological performance. When compared to the sham group, cleaved caspase-3 and Bax were significantly elevated in SCII, however the overexpression was inhibited by miR-3568 AMO. In contrast to cleaved caspase-3, Bcl-2 expression levels exhibited a pattern. Following the attenuation of this increase by SCII and microRNAs-3568 AMO, the expression of GATA6, GATA4, and RBPJ reduced.

Learn more about microRNAs here brainly.com/question/14979443

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8 0
2 years ago
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Dmitry_Shevchenko [17]

Answer:

The correct answer is - carbohydrates.

Explanation:

The four significant groups of macromolecules found in living beings are carbohydrates, lipids, nucleic acids, and proteins. carbohydrates comprised of carbon, hydrogen, and oxygen molecules, generally in a proportion of 1 : 2 : 1.

Living things use carbohydrates as their main form of energy.  Carbohydrates are a class of macromolecules is essentially utilized as a quickly accessible energy source by living things.

Thus, the correct answer is - carbohydrates.

7 0
3 years ago
What are the main organs of the Skeletal System?
Svetradugi [14.3K]

bones, ligaments, tendons and joints hope this helps! :)

8 0
2 years ago
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