Unit 2 DNA Study Guide Hi, I just need some help answering these questions to help me study for a biology quiz using these terms

1. what is the first step of protein synthesis?

2. what are some characteristics of a person with an extra set of chromosomes (XXY) might have?

3. what do amino acids form? Why is it important that they are assembled in a particular order

4. if given the DNA template strand of TAG GCC AAT CAG GCA, what would be the complementary RNA strand?

5. Describe sickle-cell anemia and what causes it?

6. Why might studies show people who exercise outside are more likely to develop DNA mutations in their skin that lead to skin cancer?

7. Give an example of an autosomal recessive condition. How can a person inherit an autosomal recessive condition?

8. How many chromosomes are found in a human cell?

9. What are punnett squares used for?

10. What is the difference between Mendelian inheritance and non-Medelian inheritance?

rocks and weathering-matching

answer; i believe the answer is (polygenic inheritance;

question#1

ans:

cell is the basic unit of organization of all living things. cells are often called the building block of life and it is the smallest unit of life. the study of cell is called cell biology. cell consists of cytoplasm enclosed within membrane, which contain bio-molecules such as proteins and nucleic acid.

two third of cell is water, which means that two-third of your whole body is water. the rest is the mixture of molecules, mainly proteins, lipids and carbohydrates.

question#2

ans:

organ:

an organ is a group of tissues specialized to form a functional unit. an example is the heart in animals.

organ system:

an organ system is a group of several organs whose functions are synchronized to release an effective action in a living organism. an example is digestive system.

question#3

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#4

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#5

our body works because of the interactions that happen between organs and organ systems.  

for example:  

the heart to regulate blood flow throughout the body. the blood carries oxygen and nutrients to the cells and carries carbon dioxide and waste away from the cells. body systems work together in maintaining a constant internal environment. when this balance is disrupted, the body systems may not function properly, and human health can suffer.   you start to feel bad.