BIOLOGY HIGH SCHOOL

There are four steps in bacterial conjugation. The second step is missing in this list.1. Special sex pilus connects two cells.
2.
3. Each cell makes a complementary DNA strand.
4. The cells separate.
Which is the missing step for the process of conjugation described?

Answers

Answer 1
Answer:

Answer:

2. The Fusion of cell membranes and transfer of single strand of plasmid DNA of donor cell.

Explanation:

When one bacterium transfers its genetic material through direct contact to others. The bacterium transfers its genetic material called donor cell and one serves it called recipient cell.

There are mainly four steps in this process-

1. Connecting sex pilus to recipient cell by donor cell.

2. The Fusion of cell membranes and transfer of single strand of DNA to the recipient cell.

3. Each bacterium cell makes a complementary DNA strand.

4. Both bacterium cells separates.
Answer 2
Answer: B. After the pilas connection between the two bacteria, the cell wall is nicked, whereby the DNA of one cell is transferred to the other.

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Describe how feedback inhibition works

Answers

Say you have a pathway 
A-->B-->C-->D 

So your A leads to production of B which leads to production of C which leads to production of D 
In feedback inhibition (or a negative feedback loop), the final product of a pathway (in this case, D) will usually inhibit or stop the first step in that pathway. So in this instance, D would do something to stop A-->B from occurring. It could bind A or the enzyme that makes that step occur. 
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What is Amber made up of?​

Answers

Answer:

Amber, which is in fact a fossil, is often held in the same class as semi-precious stones such as turquoise and jade because of its ornamental uses. Unlike these stones, amber is not mineralized. Rather, it is simply the fossil of resin. Most that exists today is between 30 and 90 million years old. derived from the resin of extinct species of trees.

Explanation:
Amber is fossilized resin from conifers.

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Answers

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Answers

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B. Mitosis produces haploid cells, and meiosis produces diploid cells
C. Chromatids are formed only during the process of meiosis
D. Mitosis has an anaphase I and II, but meiosis only has anaphase I

Answers

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Answers

Explanation:

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