Nuclear pores. DNA is to large to go in the nuclear pores but MRNA can.
Answer:
Sarah should add 19 grams of protein to her diet if she gets pregnant.
Explanation:
Daily protein requirements = body weight in x conversion factor
Pregnant women= 1.1g/kg prepregnancy body weight
Sarah's prepregnancy weight= 132 pound
Sarah should add about 19 grams of protein to her diet to account for the higher protein requirements of pregnancy. That’s only about 1 cup of Greek yogurt. Pregnancy might be the time to switch to these “twice the protein” products.
Answer:
False
Explanation:
The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.
Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases). This is the way of gene expression regulation.
The effects of modifications are different, for example methylation promotes condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).
Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.
Answer:
Un nucleótido esta formado por una molécula de azúcar (ribosa en el ARN o desoxirribosa en el ADN) unido a un grupo de fosfato y a una base nitrogenada.
Explanation:
ADN, ARN son polímeros formados por largas cadenas de nucleótidos.
Las bases utilizadas en el ADN son: adenina, citosina, guanina y timina
En ARN, la base uracilo y ocupa el lugar de la timina.
The correct answer for the question above is
letter c. It is the part where controlling
voluntary body movements, processing information from sense organs, thoughts,
and learning abilities. It is the<span> responsibilities of the region of the brain highlighted in the image.</span>
