All categories

3 years ago

Describe an experiment you could do to see if an earthworm prefers acidic or alkaline soil

Biology

1 answer:

Anon25 [30]3 years ago

6 0

Answer:

Because earthworms do not like soil that is too acid, alkaline, dry, wet, hot or cold, their presence is a good indicator of soil conditions suitable for plant growth. Earthworms do not like acid soils with pH (CaCl2) less than 4.5. The addition of lime raises pH and also adds calcium.

You might be interested in

11. The governments of many countries have regulations

egoroff_w [7]

4) add to the biodiversity.

this one is right. I’m sure. Hope it helps!

4 0

3 years ago

What are the substances roles during photosynthesis

Aleks [24]

Well,During Photosynthesis Sunlight Converted into chemical energy Water Combines with carbon dioxide to form glucose Chlorophyll Combines with water to form oxygen.

6 0

3 years ago

Enzyme X has a primary structure made up of 130 amino acids. In tertiary structure amino acids numbers 56, 58, 81-84, and 91-95

Fantom [35]

Question:

The question is unclear but I think I found it elsewhere and have rewritten it below:

Enzyme X has a primary structure made up of 130 amino acids. In tertiary structure amino acids numbers 56, 58, 81-84, and 91-95 form the active site.

Looking at the data in the attached table, determine the category of unknown molecules A, B and C.

1) A = cofactor B = non-competitive inhibitor C= non-competitive inhibitor

2) A = competitive inhibitor B = not a cofactor C= non-competitive inhibitor

3) A = not a cofactor B = competitive inhibitor C= non-competitive inhibitor

4) A = non-competitive inhibitor B = non-competitive inhibitor C= competitive inhibitor

5) A = competitive inhibitor B = non-competitive inhibitor C= non-competitive inhibitor

Answer:

2) A = competitive inhibitor B = not a cofactor C= non-competitive inhibitor

Explanation:

A competitive inhibitor is a molecule that binds to the active site of an enzyme, directly blocking its ability to catalyse reactions and thus inhibiting its activity. A non-competitive inhibitor inhibits the activity of an enzyme, but not through binding an active site. A co-factor is an accessory protein that influences and promotes the activity of the enzyme

The table shows that unknown molecule A binds to the active site (based on the amino acid positions at which it binds) and reduces the activity of the enzyme (from 31.8 - 11.4) - a competitive inhibitor

Unknown molecule B does not bind at the active site, and has no affect on the activity of the enzyme - not a co-factor or an inhibitor

Unknown molecule C does not bind to the active site, but strongly reduces the activity of the enzyme - a non-competitive inhibitor

6 0

4 years ago

(WILL MARK BRAINLIEST AND THANK YOU!) **EXTRA POINTS**

melomori [17]

Answer:

Ok The question is kind of confusing. so I'm jut going to describe what I see and name it.

the big Orange one is the nucleaus. The smaller light green ones are the mitocondrea. The dark green is the "Post offfice" for the cell (forgot name sorry) Lighter green outside is cell membrane, darker green is cell wall.

That's is as much as i can tell you right now, but i will edit my answer when i get better ones.

Explanation:

6 0

3 years ago

Compare and contrast prophase of mitosis and prophase of meiosis1?

Crazy boy [7]

Answer:

The homologous chromosomes pair together in prophase 1 of meiosis, but they do not during prophase 1 of mitosis. This is achieved by a process known as synapsis, where the similar chromosomes pair according to sequence similarity. The homologous chromosomes are held together by a protein structure known as the synaptonemal complex in a chromosome body known as a tetrad (because it contains 4 replicated chromosomes known as chromatids) or bivalent (if the organism is diploid). This pairing during prophase 1 of meiosis allows recombination to take place between the homologous chromosomes. This occurs early during prophase but the manifestation of recombination only becomes visible during the later stages of prophase 1 and in metaphase 1. Because the chromosomes adopt different structures during prophase 1 of meiosis, this stage is sub-divided into 5 stages: leptotene, zygotene, packytene, diplotene and diakinesis. It is during diplotene and diakinesis that the physical manifestation of recombination can be seen. This is the presence of chiasmata (chiasma, singular). These are the sites where recombination, or exchanges between homologous chromosomes, has taken place. By the end of prophase 1, it is only the chiasmata that holds the homologous chromosomes together. This constriction make the tetrads adopt a variety of structures, the shape of which depends upon the number of chiasmata formed. The tetrads stay in this conformation until metaphase 1. Synapsis, the formation of the synaptonemal complex, the formation of chiasmata does not take place during prophase 1 of mitosis and these processes represent the major differences between prophase of the two nuclear divisions.

3 0

3 years ago