Inside Life SciencePLEASE HELP!!!!I will name you brainliest if you answer correctly!!!

What is the value of X 2/3X equals 4

AleksandrR [38]

Answer:

x=6

Explanation:

So this is the basic problem

2/3x=4

You have to times 3/2 to each side, since you want to know x's value

so x=4*3/2

That is x=6

Hope it helps!

8 0

3 years ago

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11.1 The Science of Ecology Lesson 11.1: True or False Name __________________ Class ______________ Date ________ Write true if

tangare [24]

Answer:

See explanation below

Explanation:

1. Biotic factors include sunlight, soil, temperature, and water. FALSE

Biotic factors include animals, plants, fungi, bacteria and protists.

2. Like nutrients and water, energy also recycles through an ecosystem. FALSE

3. An ecosystem consists of all the biotic and abiotic factors in an area and their interactions. TRUE

4. Herbivores are a necessary link between producers and other consumers. TRUE

5. A niche refers to the place an organism lives within its ecosystem. TRUE

6. Dung beetles eat animal feces. TRUE

7. Autotrophs make their own food. TRUE

8. Organisms use 90% of the available energy at each trophic level. FALSE

9. Carnivores include lions, polar bears, hawks, frogs, salmon, and deer. FALSE

Deer is a herbivore.

10. Biomass increases at the upper levels of a food chain. FALSE

11. Producers occupy the first trophic level. TRUE

12. Scavengers include vultures and raccoons. TRUE

13. In a complex ecosystem, it is likely that two different species will occupy the same niche. FALSE

14. The habitat is the role of a species in its ecosystem. FALSE

15. A food web shows how energy flows through an ecosystem. TRUE

4 0

3 years ago

Thyroid cells and cardiac cells have different DNA. True or False

Digiron [165]

Answer:

false

Explanation:

4 0

3 years ago

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A sample ( 885 mg ) of an oligomeric protein of M r 155,000 was treated with an excess of 1‑fluoro‑2,4‑dinitrobenzene (Sanger's

saul85 [17]

Answer:

In 1945, Frederick Sanger described its use for determining the N-terminal amino acid in polypeptide chains, in particular insulin.[4] Sanger's initial results suggested that insulin was a smaller molecule than previously estimated (molecular weight 12,000), and that it consisted of four chains (two ending in glycine and two ending in phenylalanine), with the chains cross-linked by disulfide bonds. Sanger continued work on insulin, using dinitrofluorobenzene in combination with other techniques, eventually resulted in the complete sequence of insulin (consisting of only two chains, with a molecular weight of 6,000).[5]

Following Sanger's initial report of the reagent, the dinitrofluorobenzene method was widely adopted for studying proteins, until it was superseded by other reagents for terminal analysis (e.g., dansyl chloride and later aminopeptidases and carboxypeptidases) and other general methods for sequence determination (e.g., Edman degradation).[5]

Dinitrofluorobenzene reacts with the amine group in amino acids to produce dinitrophenyl-amino acids. These DNP-amino acids are moderately stable under acid hydrolysis conditions that break peptide bonds. The DNP-amino acids can then be recovered, and the identity of those amino acids can be discovered through chromatography. More recently, Sanger's reagent has also been used for the rather difficult analysis of distinguishing between the reduced and oxidized forms of glutathione and cysteine in biological systems in conjunction with HPLC. This method is so rugged that it can be performed in such complex matrices as blood or cell lysate.[6][7]

Explanation:

Example: A sample (525 mg) of an oligomeric protein of Mr 117,000 was treated COOH with an excess of1-fluoro-2,4-dinitrobenzene (Sanger's reagent) under slightly alkaline conditions until thechemical reaction was complete. The peptide bonds of the protein were then completelyhydrolyzed by heating it with concentrated HCI. The hydrolysate was found to contain 3.37 mgof DNP-Val (shown at the right), 2,4-Dinitrophenyl derivatives of the α- amino groups of otheramino acids could not be found H3C Calculate the number of polypeptide chains in this protein.Give the answer as a whole number Number A second oligomeric protein of M 230,000 wasshown by a similar endgroup analysis to consist of five polypeptide chains. SDS polyacrylamidegel electrophoresis in the presence of a reducing agent shows three bands: α (M, 30,000), β (M40,000) and γ(M-60,000), indicating three distinct polypeptides. SDS electrophoresis withoutreducing agent also yields three bands, with Mr of 30,000, 40,000, and 120,000 Which of the

4 0

3 years ago

How is the nervous system different from the endocrine system? *

Volgvan

Answer:

It is faster and depends on chemical messenger (hormone

I guess this one is right, to be sure ask from someone else 2

Explanation:

One of the most significant differences between the nervous system and endocrine system is that the nervous system uses electrical impulses to send messages through neurons while endocrine glands use hormones to send messages to the target cells through the bloodstream.

3 0

4 years ago