The earth was formed by natural processes.

Many signaling pathways have multiple transducer proteins, for example in a multi-enzyme phosphorylation cascade - one of the pu

zimovet [89]

Answer:

b. to amplify the signal

Explanation:

A multi-enzyme phosphorylation cascade is a series of signaling events where one enzyme phosphorylates to another, then this last enzyme acts to phosphorylate another protein and so successively, thereby triggering a chain reaction that leads to the phosphorylation of hundreds or even thousands of proteins. A multi-enzyme phosphorylation cascade is known to increase the number of activated (phosphorylated) proteins at each step of the signaling cascade. Phosphorylation is a posttranslational modification capable of activating proteins during long periods, thereby a phosphorylation cascade also enables the activation of multiple proteins before these proteins become inactive again.

8 0

3 years ago

In the complete oxidation of glucose, six CO2 molecules are formed per glucose molecule. The number of CO2 molecules released by

Serga [27]

Answer:

0, 2, 4

Explanation:

The process of cellular respiration takes place in for phases which oxidizes the glucose molecule to the provide energy molecule called ATP.

Along with ATP, the process releases the metabolic water and carbon dioxide gas. In the oxidation of one glucose molecules, about 6 molecules of CO₂ are released. These CO₂ molecules are produced in the following manner:

1. Glycolysis: CO₂ gas is not produced during this reaction but only ATP and NADH are produced.

2. Pyruvate decarboxylation: the process converts the pyruvate produced by glycolysis to Acetyl-CoA. Formation of 1 Acetyl-CoA produces 1 CO₂ and since 2 Acetyl-CoA is produced therefore produces 2 CO₂ molecules.

3. Citric acid cycle: The cycle converts 2 Acetyl-CoA and produces 4 CO₂ in two cycles converting each Acetyl-CoA.

Thus, 0, 2, 4 is correct.

7 0

3 years ago

1. Introduction:

inna [77]

Answer:

1. Introduction

a. The Tiktaalik is a fossil that existed about 12 million years before the first tetrapods.

b. The items homeostatic mechanisms show are continuity and change.

2. Continuity

a. Our Excretory system is the system responsible for the discharging of waste products from the body.

Explanation:

1 a. Tiktaalik fossil (Tiktaalik roseae), also known as the "fishapod," is a 375 million year old fish fossil discovered in 2004 in the Canadian Arctic. The fossil displays a mixture of fish and amphibian traits (i.e the pioneer tetrapods). Those tetrapod features in the Tiktaalik marks the earliest appearance of these features in fossil record.

Importance: The discovery of the Tiktaalik fossil explains a crucial point in the history of life on Earth: i.e it sheds light on when the very first fish ventured out of the water onto land.

b. Continuity in homeostasis implies common ancestry or homology. For example the excretory system in flatworms, earthworms and vertebrates basically serves the same function, and has remained unchanged (save for a few tweaks), over the last few million years.

Change implies changes in the environment which causes changes in homeostatic mechanisms. For example the transition of aquatic animals from water to land which necessitates changes in their respiratory mechanisms.

2. Continuity

a. The excretory system is the system of an organism's body that is responsible for the function of excretion, the process of eliminating bodily wastes produced by homeostasis.

The mechanisms of homeostasis are body temperature, body fluid composition, blood sugar, gas concentrations, and blood pressure.

The organs that are involved in this process of waste elimination are the sweat glands, the liver, the lungs and the kidneys.

5 0

3 years ago

What can be analyzed to determine how many base pairs a segment of dna has?

irga5000 [103]

The total number of base pairs is equal to the number of nucleotides in one of the strands (each nucleotide consists of a base pair, a deoxyribose sugar, and a phosphate group).

3 0

2 years ago

Can someone please answer this question for me?? Thank you

Tcecarenko [31]

Answer:

The answer is c.

Explanation:

Though, more xpensive, the halogen L.B. lasts a lot longer than the,(4 lack of expression on my part).. the "swirly bulbs" are lined with a chemical that affects the environment once disposed of..

The gov. has forbidden the public from buying these bulbs. Although, menards, walmart, etc...bought a surplus of these bulbs, companies are desperate 2 get rid of them, bcause of the above issues..but still not cheap...

7 0

3 years ago