Repulsion between negatively charged backbone of DNA double helix van der Waals interaction
Interaction between water and carbonyl oxygen of guanine hydrogen bond
Answer:
Interaction between hydrophobic (nonpolar) amino acid side chains is due to hydrophobic interactions.
Repulsion between negatively charged backbone of DNA double helix is due to electrostatic repulsion forces.
Interaction between water and carbonyl oxygen of guanine is due hydrogen bonding
Explanation:
The hydrophobic effect refers to the tendency of non-polar substances forms aggregates in an aqueous solutions in order to avoid interactions with water molecules. This results in a favorable entropy increase.
For non-polar amino acids, hydrophobic interactions are important in stabilizing their structure wherein they are densely packed within the core of a protein while those with with polar groups are found in the exterior.
The phosphate backbone of DNA is negatively charged. Since like charges repel, therefore, electrostatic repulsion forces of the ions are responsible the repulsion of the backbone DNA double helix.
Hydrogen bonds are formed between electronegative oxygen atoms and hydrogen atoms of neighboring molecules due to the partial negative and positive charges on each of the atoms.
This hydrogen bonding is responsible for the interaction between water and carbonyl oxygen of guanine as the hydrogen atoms of the water molecules are attracted to the oxygen atoms of the guanine molecules due to the partial charges on each of the atoms.
B. A late-night comedian using a photo as part of a political joke
C. A sports fan using player photos to sell souvenirs at games
D. A teacher using a photograph in a presentation to his class
Answer:
C. A sports fan using player photos to sell souvenirs at games
Explanation:
The situation least likely to be fair use is a sports fan using player photos to sell souvenirs at games.
The situation that is least likely to be fair use is option C, where a sports fan is using player photos to sell souvenirs at games. Fair use allows for limited use of copyrighted material without permission from the rights holder, but in this case, the sports fan is using the photos for commercial purposes, which is less likely to be considered fair use.
On the other hand, options A, B, and D are more likely to be fair use. In option A, a journalist is using a video clip in a report on a government meeting, which could be considered fair use as it is for educational or informational purposes. Option B, where a late-night comedian uses a photo as part of a political joke, could fall under fair use as it is for commentary or criticism. Option D, where a teacher is using a photograph in a presentation to his class, could also be considered fair use as it is part of an educational setting.
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Answer:
To view prokaryotes with the compound microscope, you must use an oil-immersion lens (100x objective).
The two organelles involved in cellular energetics are mitochondria and chloroplasts. While both organelles are involved in cellular energetics, they are only found in specific types of cells.
Mitochondria are found in both animal and plant cells, whereas chloroplasts are only found in plant cells. Organelles are specialized structures present inside cells that perform specific functions.
These functions can include metabolism, transport, and protection. Organelles are generally membrane-bound, meaning they are surrounded by a membrane that separates their internal components from the rest of the cell. Organelles work together in a coordinated fashion to maintain the overall health and function of the cell.
Cellular energetics refers to the processes by which cells obtain and utilize energy. This energy is used for a variety of functions, including movement, growth, and reproduction. The two organelles most closely associated with cellular energetics are mitochondria and chloroplasts.
Know more about cellular energetics:
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Answer:
Water is Polar
Explanation:
There is no overall charge to a water molecule, but there is a slight positive charge on each hydrogen atom and slight negative charge on the oxygen atom.