BIOLOGY HIGH SCHOOL

Which is a journal in which scientists publish original, scholarly research? Popular Science

Science

Scientific American

Natural History

Answers

Answer 1
Answer: The answer is Science. Science is one of the most respected scholary journals where scientists can publish their work after they have written up a manuscript. However, publishing in Science is not easy. Once the authors of a certain proposed paper write it and send it to the editors, the paper itself undergoes a process called double blind peer-review, where their paper is being fact-checked and otherwise scrutinized by multiple researchers of their field in order to maintain a very high quality level of the papers that are being published in Science. 

Related Questions

MIDDLE SCHOOL

Hemoglobin is a protein that binds to oxygen. It is only produced by red blood cells and it allows blood to transport oxygen throughout the body. What statement does this information best demonstrate?

A.
Proteins in specialized cells are the result of the expression of particular genes.
B.
The proteins produced by cells have structures that are related to their function.
C.
Specialized cells that are grouped together and perform similar functions are called tissues.
D.
Proteins with similar functions to those produced in humans can be found in other species.

Answers

I think its A I Hope its right :)

i think the answer is b

MIDDLE SCHOOL

40 POINTS! PLEASE HELP! I NEED IT! Which traits are characteristic of single-celled organisms? Choose all answers that are correct. A. can grow larger by making new cells B. contain organs that help them survive C. must stay small in order to live D. can reproduce a whole colony in a matter of hours

Answers

Answer: B And D ;3 hope this helps!

COLLEGE

The following enzymes or processes are known to regulate eukaryotic gene expression. In the blank provided by each enzyme or process, enter the number 1 if the enzyme or process increases gene expression or the number 2 if the enzyme or process decreases gene expression. (a) histone acetyltransferases (HATs) ____
(b) histone deacetylases (HDACs) ____
(c) acetylation ____
(d) deacetylation ____
(e) decreased attaraction between DNA and histones ____
(f) increased attraction between DNA and histones ____

Answers

Answer:

a) 1 b) 2 c) 1 d) 2 e) 1 f) 2

Explanation:

a) A coactivator CBP  contains a subunit that has histone acetyltransferase (HAT) activity.  These enzymes transfer acetyl groups from an acetyl CoA donor to the  amino groups of specific lysine residues on histone proteins.  

-Gradually this leads to activation of several other coactivators and as a result initiation of transcription takes place.

b) HDACs are associated with transcriptional repression. HDACs are present as subunits of larger  complexes described as corepressors.

-Corepressors are similar to  coactivators, except that they are recruited to specific genetic  loci by transcriptional factors (repressors) that cause the targeted gene to be silenced rather than activated.

c) Acetylation of histone  residues is thought to prevent chromatin fibers from folding into compact structures, which helps to maintain active, euchromatic regions.

-On a finer scale, histone acetylation increases access of specific regions of the DNA template to interacting proteins, which promotes transcriptional activation.

d) Deacetylation of the the histone tails makes the DNA more tightly wrapped around the histone cores, making it difficult for transcription factors to bind to the DNA. This leads to decreased levels of gene expression.

e) Decreased attraction is directly  proportional to loosening of the DNA from histone core hence accessible to the transcriptional factors which  further leads to transcription and gene expression  

f) Increased attraction means DNA gets tightly wound around the histone core and inaccessible to the transcription factor hence decreased gene expression.

HIGH SCHOOL

A pluripotent stem cell _____. a. can develop into a new organism if placed in a womb after its first four divisions during fertilization
b. can differentiate as one type of cell only
c. is an adult stem cell
d. does not have the ability to develop into a new organism, but can give rise to any of the cell types in a body
e. can allow regeneration of human body parts such as limbs

Answers

Answer:

d. does not have the ability to develop into a new organism, but can give rise to any of the cell types in a body

Explanation:

they are referred to as master cells with the ability to make cells from all three basic body layers, so they can potentially produce any cell or tissue the body needs to repair itself.

The answer is D I’m sure of it
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