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Marianna [84]
3 years ago
9

Homework Help? Please.

Biology
1 answer:
Zinaida [17]3 years ago
4 0
Which number do you need help on? All?
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Question 2
zhannawk [14.2K]
The answer is ionic
7 0
3 years ago
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Why can't proteins and starch enter the cell?
SVETLANKA909090 [29]

Answer:

This is because the cell membrane is a partially permeable membrane, hence allowing the smaller molecules to enter it and larger molecules to be out. For example, protein is too large to enter the cell

Explanation:

6 0
3 years ago
What are histones, and how are they arranged in nucleosomes? Drag the terms on the left to the appropriate blanks on the right t
Eva8 [605]

Answer:

1) c. five

2) a. lysine and arginine

3) g. two

4) d. four

Explanation:

A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Basically, nucleotide comprises of the following parts;

1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.

2. A phosphate group.

3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.

The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;

I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.

II. Phosphate: this is the structural backbone that provides support to DNA.

Histones are a group of highly basic proteins that are mainly associated with deoxyribonucleic acid (DNA) in the nucleus of a living organism and then condense it to chromatin.

Histones include five main classes of relatively small basic proteins containing relatively large amounts of lysine and arginine. Nucleosomes are made of two each of four types of histones.

4 0
3 years ago
What experiments are being performed in<br> regards to evolution?
tresset_1 [31]

Answer:

I think laboratory experiments

Explanation:

3 0
3 years ago
The deforestation of rainforest ecosystems for logging and for farming has had what direct effect on those areas?
zloy xaker [14]
Loss of habitat for the surrounding wildlife. therefore a long term affect of the wildlife that lived there. If deforestation continues the forest and its inhabitants with either have to relocate or die trying to find a new place to live.
8 0
3 years ago
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