Which of the following is true of carbon?

PLEASE HELP ASAP 5 MINUTES LEFT what is the role of the enzyme diaphorase

Stells [14]

Diaphorase or dihydrolipoyl dehydrogenase is a flavoprotein enzyme capable of oxidizing the reduced form of NAD (NADH). This lipoamide dehydrogenase is a component of the glycine cleavage system, as well as of the alpha-ketoacid dehydrogenase complexes. It binds one FAD per protein subunit. The enzyme is provided in 3.2 M ammonium sulphate.

8 0

3 years ago

An individual with Huntington disease has two normal parents. What are plausible explanations for this pattern of inheritance? C

Vitek1552 [10]

Answer and Explanation:

The Huntington disease is caused by a mutation in the gene that codifies for the Huntingtin protein (Htt). The mutation produces an altered form of the protein leading to the neuron´s death in certain areas of the brain.

The Huntington disease characterizes for being,

Hereditary, passing from generation to generation. To express the disease, a person must have been born with an altered gene.

Autosomal, affecting men and women equally, because the mutated gene is located on an autosomal chromosome.

Dominant, which means that by getting only one copy of the altered gene coming from any of the parents, the receiving person will express the disease. The mutation in the gene dominates over the normal gene copy.

Expressed by heterozygosis. Most people affected by the disease are heterozygous, with a normal copy and a mutated copy.

There are just a few cases all around the world (3% approximately) in which the disease is expressed with no family history. The progenitors are not affected by the mutation. These cases are very rare and are called "de-novo" mutations. A new mutation is spontaneously produced and it is not inherited from any of the parentals. It consists of an increase in the number of CAG repetitions. In a normal person, the number of CAG repetitions is less than 35. When there are 40 or more repetitions it occurs the disease. But when there are between 35 and 39 repetitions, the penetrance of the disease is incomplete. This is a "gray zone". Those alleles that fall in the gray zone are unstable and might produce the HD. Individuals with these unstable alleles have a tendency to increase the number of repetitions from generation to generation until the number reaches 40 repetitions and the person expresses the disease. This usually occurs in the paternal germinal line, as it is particularly unstable in sperm and probably meiosis greatly affects their instability, causing an increase in the number of CAG repeats.

6 0

3 years ago

masteringbio JFor each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employin

juin [17]

Incomplete question. The remaining part of the question read;

Words in the left column:

Yes
No
Observational
Manipulative

1. A physiologist incubates eggs in the lab at a range of temperatures to see what temperatures produce males and what temperatures produce females.

2. A biologist predicts that shade might influence ground temperature, and therefore turtle sex ratios. He records the sex ratio of turtle hatchlings in shaded and unshaded regions

3. An ecologist predicts turtles grow larger when no predators are around. She places turtles in an experimental pond system where half the ponds have predators and half the ponds have had the predators removed.

4. A climatologist predicts that concentration of CO2 in a city will be negatively correlated with the amount of wind in that city. He collects data and looks at the amount of CO2 in a city as a function of the wind speed in the city.

5. A sociologist conducts a survey in Hawaii to describe people's attitudes about global climate change.

6. A scientist determines the average wind speed, and variation in the amount of wind, in a number of locations to see which locations would be most suitable for wind turbines

Answer/Explanation:

1. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

We can make this conclusion here that the physiologists' research is hypothesis-driven since we are told he wanted to "see what temperatures produce males and what temperatures produce females." In other words, he wanted to know whether the temperature used in incubators can influence the sex of an egg by means of observation.

2. Hypothesis-driven? Yes!

Observational or Manipulative? Observation.

3. Hypothesis-driven? Yes!

Observational or Manipulative? Manipulative.

We can make the conclusion that is the ecologist used the manipulative method in her research since she decided to place the turtles in two different types of ponds; one where half the ponds have predators while in the other the pond the predators have been removed. In other words, she manipulated the independent variables.

4. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

Note, the use of the word, "predicts" in most instances underscores the tone of hypothesis-driven research, hence we can say Yes! And remember, we are told the researcher "collects data", meaning he is merely observing differences that occur naturally.

5. Hypothesis-driven? No!

Observational or Manipulative? Observational.

6. Hypothesis-driven? No!

Observational or Manipulative? Observational.

5 0

3 years ago

How do I Construct a table to compare the products and reactants in photosynthesis and cellular respiration

katen-ka-za [31]

Explanation:

Create the column headings "Reactants" and "Products". The two row headings should be "Photosynthesis" and "Cellular respiration".

Before filling in the table, make sure you know what the products and reactants from photosynthesis and cellular respiration are.

Remember reactants are the 'before' on the left, and products are the 'after' on the right.

Photosynthesis:

$CO_{2} + H_{2}O+light =>O_{2}+C_{6}H_{12}O_{6}$

Cellular Respiration:

$O_{2}+C_{6}H_{12}O_{6}=>CO_{2} + H_{2}O+ATP$

See attachment for how the table could look.

6 0

3 years ago

Why tropical rain forests contain a large variety of plants and animals.

Jet001 [13]

Sorry If I misspell or have horrible grammar

Explanation :

Rainforests have a lot of plants and animals because ;

Climate : The rainforest(s) are in very tropical regions , meaning the recieve a lot of sunlight . The energy is stored in plant vegetation . Animals are attracted to the food and eat it .

Edit : Also I tried to put the answer I found into my own words , I noticed the 1st person copied and pasted an answer which is copying

3 0

2 years ago