Answer:
a. Bacteria cannot carry out splicing.
Explanation:
Human genes contain non-coding sequences called introns. Transcription of genes produces primary transcripts that undergo post-transcriptional modifications to produce mature mRNA. These modifications include removal of introns, the addition of 3' poly-A tail and 5' cap. The splicing of introns from primary transcripts is followed by ligation of protein-coding sequences exons to produce mature mRNA. The mRNA leaves the nucleus and serves as a template for protein synthesis.
Splicing of introns requires specific machinery such as several small nuclear ribonucleoprotein complexes, etc. which are not present in a prokaryotic cell. Therefore, a eukaryotic gene like the gene for human growth hormone is not expressed in a bacteria cell as these prokaryotic cells cannot carry out the splicing of introns from pre-mRNA.
Answer:
24
Explanation:
24 mating pairs are illustrated in Model 1 .
Answer:
A
Explanation:
by definition, cell membrane receptor are specialized membrane proteins, allowing communication between the cell and the extracellular space.
The following is true of weather: PATTERN MAY CHANGE FROM HOUR TO HOUR OR FROM DAY TO DAY.
Weather refers to the atmospheric condition in a particular place over a short period of time. Weather is measured by considering different variables such as temperature, relative humidity, precipitation, etc. Climate on the other hand refers to the weather condition of a place that is measured over a long period of time, normally over a period of 30 or 35 years.
