Homework Biology
1.
Ionic bond – is a linkage-type formed as a result of the electrostatic attraction of the oppositely charged ions within a chemical compound. An example is the formation of NaF or sodium fluoride from the sodium and fluorine atoms.
Covalent bond – is formed when the atoms share electrons pairs. An example is a hydrochloric acid.
Hydrogen bond – formed when a molecule’s positive ends get attracted to another molecule’s negative ends. An example is the bonding of water molecules to form ice.
- Phenomenon property
| Phenomenon | Property (A, B, C…….) | Explanation |
| During the winter, air temperatures in the the Northern United States can remain below 0°C for months; however, the fish and other animals living in the lakes survive “During the winter air temperatures in the northern United States can remain below 0°C for months however fish and other animals living in the lake survive.” | A, B, C, and F | When the molecules of water get too cold, they dissociate. The floating ice is caused by hydrogen bonding. The floating ice then acts as an insulator, which enables life to proceed underneath. |
| “Many substances like salt (NaCl) and sucrose-dissolve quickly in water.” | A, B, and E | Oppositely charged water molecules surround each ion |
| “When you pour water into a 50-mL graduated cylinder, a meniscus forms at the top of the water column.” | A and B | The H2O molecules usually stick together due to hydrogen bonding. |
| “Sweating and the evaporation of sweat from the body surface help reduce a human’s body temperature.” | A, B, C, and E | When evaporation of a substance takes place, there is a cooling down of liquid left or remaining. |
| “Water drops that fall on a surface tend to form rounded drops or beads.” | A | H20 molecules are generally cohesive and form hydrogen bonds with one another, making the water drops to become rounded. |
| “If you touch the edge of a paper towel to a drop of colored water, the water will move up into (or be absorbed by) the towel.” | B | The polar H2O molecules usually adhere to the paper towel’s cellulose and also cohere with one another; thus, they are usually drawn up in a towel. |
- Since the H2O molecules freeze at 32F, the farmer’s water, which is sprayed over the crops freezes, thus, holding the freezing temperature. This action protects crops underneath from temperatures below the freezing points. When freezing of hydrogen bonds occurs, the molecules get expanded and tend to float past the crops, which are insulating it the external temperatures.
- The human blood with a PH 0f 7.4. This is because the higher OH- the greater the PH value.
- Carbohydrates – offers cell energy.
- Lipids – offers energy storage
- Proteins – keeps proper body PH
- Nucleic acids – carries the cell’s genetic data.
- It refers to structure loss as a result of outside factors leading to the protein’s incapability to carry out its usual works. It is caused by changes in PH and temperatures.
- The DNA possesses a double strand, whereas RNA is usually single-stranded.
- DNA is unable to move outside the nucleus, while the RNA has the ability.
- DNA’s sugar is normally deoxyribose, while the RNA’s is ribose (Panawala, 2017).
References
Panawala, L. (2017). Difference Between DNA and RNA Nucleotides. Cell Biology, 1-9.
Complete the table below, illustrating how these properties of water above are related to the
phenomena listed below. More than one property may be used to explain a given phenomenon.
You also need to explain how each property is responsible for each phenomeno
omplete the table below, illustrating how these properties of water above are related to the
phenomena listed below. More than one property may be used to explain a given phenomenon.
You also need to explain how each property is responsible for each phenomeno