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maw [93]
3 years ago
9

Proteins and polysaccharides are polymers. These polymers are formed by dehydration synthesis. Which statement correctly identif

ies a difference in the structure of proteins and polysaccharides? *
A. forming a variety of gametes that will pass on hereditary information

B. disrupting meiosis and the synthesis of amino acids into a sequence

C. producing the inorganic molecules needed for normal cell growth

D. directing the synthesis of proteins necessary for proper cell function
Biology
1 answer:
Dmitry [639]3 years ago
5 0

D. directing the synthesis of proteins necessary for proper cell function

I hope this helps a little.

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To classify animals and distinguish them
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3 years ago
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True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone prote
Dmitrij [34]

Answer:

False

Explanation:

The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.

Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases).  This is the way of gene expression regulation.

The effects of modifications are different, for example methylation promotes  condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).

Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.

5 0
3 years ago
A scientist wants to study how the body uses foods and fluids during a marathon run. This scientist is most likely
marshall27 [118]

Answer:

not my dad that's for sure

4 0
2 years ago
Given the following cross TtYyRr x TtyyRr (T = tall; t = short Y = yellow; y = green R = round; r = wrinkled), what proportion o
mihalych1998 [28]

Answer:

3/32 ttyyR-  

Explanation:

Cross: Tall, Yellow, Rounded individuals with a tall, green, rounded individual

Parentals) TtYyRr      x      TtyyRr      

Gametes) TYR, TyR, TYr, Tyr, tYR, tyR, tYr, tyr (Parent one)

                 TyR, TyR, Tyr, Tyr, tyR, tyR, tyr, tyr (Parent two)

We need to know what proportion of offspring is expected to be short plants with round, green seeds. So we need to identify the gametes for these traits. The genotypes are:

  • Shot → tt
  • Round → RR or Rr
  • Green → yy

⇒ Parent one can provide gametes tyR and tyr

⇒ Parent two can provide gametes tyR and tyr

(1/8 tyR x 2/8 tyR) + (1/8 tyR x 2/8 tyr) + (1/8 tyr x 2/8 tyR) =

2/64 ttyyRR + 2/64 ttyyRr + 2/64 ttyyRr =

1/32 ttyyRR + 2/32 ttyyRr =

3/32 ttyyR-          

4 0
3 years ago
Pls answer all the questions
Zarrin [17]

Answer:

A. Cell wall

C.

E. Ribosomes

G.

H.

I.

K.

L.

Explanation:

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3 years ago
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