Answer:
A promoter and a start codon are similar in that both are sequences of Nucleic acid that are required to start important processes, and both determine the sites where the process will begin. The key differences are that the promoter is needed to start transcription and the start codon is needed to start translation. Also, the promoter is a DNA sequence only, and the start codon is a sequence found within a(n) mRNA .
Explanation:
The promoter is the sequence of DNA that serves as a binding site for RNA polymerase. The RNA polymerase is the enzyme of transcription. Promoters are required to start the process of transcription. Transcription is the process of making RNA copies of the DNA template strand.
The start codon is the first codon in mRNA that is translated during protein synthesis. The start codon marks the start of the protein-coding region of the mRNA. Binding of aminoacyl tRNA with complementary anticodon to the mRNA start codon begins the process of translation.
Answer:
Dorsal nerve cord
Explanation:
For chordates, based on the particular life cycle there are at, they could either posses a NOTOCORD or a DORSAL NERVE CORD.
Chordates can be fishes, reptiles, manmals , vertebrates amphibians, birds etc.
Please let me add that, CHORDATES are mostly if not entirely vertebrates and as such possess DORSAL NERVE CORD.
N.B
Ventral nerve cord are for invertebrates
Answer:
The CRISPR-Cas9 genome editing system can be used to edit genes and correct mutations associated with inherited diseases. However, this technology also has the potential to edit genes in germline cells in order to irreversibly modify the human species and the natural evolution of life
Explanation:
The CRISPR-Cas9 (Clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9) system is a natural prokaryotic defense system used by bacteria to defend against invading DNA. In the laboratory, the CRISPR-Cas9 system has been repurposed to create a versatile genome-editing tool that allows us to modify the genome of mammalian cells in a targeted fashion. The CRISPR-Cas9 is a simple gene-editing tool that consists of a single guide RNA (sgRNA) that guides the Cas9 enzyme to the exact genomic location where Cas9 needs to make a cut, which is then repaired by different DNA repair mechanisms. During DNA repair, nucleotides can be replaced and/or deleted, thereby producing desired genomic modifications. The CRISPR-Cas9 has an enormous potential to repair mutations in genes associated with inherited genetic disorders and cancer (i.e., oncogenes might be reversed in vivo by using this technology). However, the CRISPR-Cas9 genome editing system is also a subject of concern due to its dual use. For example, this technology can be used to modify the genome of germline cells by inducing mutations that can be passed across generations, thereby irreversibly modifying human DNA and altering the normal course of evolution.
Answer:
Agnosia typically is defined as the inability to recognize sensory stimuli. Agnosia presents as a defect of one particular sensory channel, such as visual, auditory, or tactile.
