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2 years ago

What was the name of the enzyme found in the liver that help break down the hydrogen peroxide

Biology

1 answer:

harina [27]2 years ago

8 0

Catalase.is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water.

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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

2 years ago

"susan is consuming 70 grams of protein per day on her 2,000-kilocalorie-per-day diet. what percent of susan's diet is protein?"

nirvana33 [79]

The answer to this question would be: 14%
Protein will give a calorie about 4kcal/gram. Then, the total calorie of protein from Susan meal would be: 70 grams * 4kcal/g= 280 kilo calorie.
To find the percentage you will need to divide the total calorie diet with the protein calorie. The calculation would be:

protein percentage= protein calorie/ total calorie
protein percentage= 280kcal / 2,000kcal = 14%

6 0

3 years ago

Question 1 options: 100% 25% 0% 50%

enyata [817]

0% considering you didn't insert the question...

7 0

2 years ago

What occurs during the S phase of interphase

Sindrei [870]

Cell Replication happens in S phase

6 0

3 years ago

Read 2 more answers

Rabbits, turtles, fish, humans, and whales all share certain characteristics but also differ from each other. All of these speci

Delvig [45]

The levels of organisation are

Domain: Eukarya

Kingdom Animalia

Phylum :Chordata

Explanation:

They all share these levels of organisation because;

for the Domain Eukarya, they have;

→multi-cellular cells containing nucleus; and other membrane bound organelle.e.g Mitochondrial.

→their DNA located in the nucleus packaged as linear chromosomes bounded by histone proteins.

→mode of reproduction which is sexual.

They share Kingdom Animalia because;

→they have multi-cellular, specialised cells, bounded by plasma membranes.

→they have specialized tissues, organs, and system.

→they all undergo heterotrophic mode of nutrition as evident in the question 'that they must consume plants and animals as source of energy'

→they exchanged communication by nervous ssytem and 

→ use homeostatic mechanisms to regulate water balance of the body through the kidney.

→Humans,Rabbits,and whales are VIVIPAROUS; they give birth to young ones alive.

→Most fishes lay eggs to reproduce, they are said to be Ovoviviparous.

They belong to phylum Chordata because ;

→they all have noto chord; which serve as template for axial skeleton.

dorsal hollow nerve cord -template for the brain and spinal cord

→pharyngeal slits- templates for gill aches in bony fishes and components of inner ear in land animals.

→ tail length varies in these organisms.

8 0

3 years ago

What was the name of the enzyme found in the liver that help break down the hydrogen peroxide￼

What was the name of the enzyme found in the liver that help break down the hydrogen peroxide