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ehidna [41]
3 years ago
6

What happens yo DNA as the cells prepares to divide​

Biology
1 answer:
Mice21 [21]3 years ago
4 0

DNA Synthesis

In preparation for cell division, the cell makes a replica of its entire DNA. This happens during the S, or synthesis, phase of the cell cycle. Mitosis is the division of one cell into two cells that each has a nucleus and the same amount of DNA as the original cell.

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___ have two X chromosomes, while<br> _____ have one X chromosome and one Y chromosome.
lana [24]

Answer:

1. Females

2. Males

Explanation:

Females inherit one X chromosome from their mother, and one X chromosome from their father. Males inherit one X chromosome from their mother and one Y chromosome from their father.

Hope this helps =)

4 0
3 years ago
Read 2 more answers
A student inoculates a gelatin tube and places it at 37C for the week. When he comes back he takes the tube out of the incubator
ycow [4]
<h2>Gelatin </h2>

Explanation:

Gelatin is a differential medium which tests the ability of an organism to produce an exoenzyme, called gelatinase (this enzyme hydrolyzes gelatin)

When gelatin is at a temperature below 32°C (or within a few degrees thereof), it is a semisolid material and at temperatures above 32°C, it is a viscous liquid

When gelatin is broken down, it can no longer solidify and if an organism can break down gelatin, the areas where the organism has grown will remain liquid even if the gelatin is refrigerated

No the conclusion by student is not right because the tube must be runny after incubation followed by refrigeration to be considered gelatinase positive

3 0
3 years ago
Cleansing the venipuncture site before collection of blood culture specimens usually involves the use of: isopropyl alcohol and
Sloan [31]

Answer:

C) isopropyl alcohol and chlorhexidine gluconate

Explanation:

The World Health Organization (WHO) guidelines mandate that the venipuncture site be cleaned with an alcohol swab of 70 percent alcohol.

Document H3-A6 is also recommended by the Clinical and Laboratory Standards Institute (CLSI) that skin disinfection with 70% isopropyl alcohol or ethanol is required before venipuncturing tosterile the skin surface. chlorhexidine gluconate  is a good repacment of isopropyl alcohol, hence used at venipuncture site.

Hence, the correct option is C.

7 0
3 years ago
How does the anaphase stage differ in the two phases of meiosis?
Ronch [10]

The answer is c. Anaphase I separates homologous chromosomes and anaphase II separates sister chromatids into daughter cells.


Meiosis is a cell division which results in the reduction of chromosome number by half (from diploid to haploid) in daughter cells. It consists of meiosis I and meiosis II. 

In anaphase I, the sister chromatids separate from each other to the opposite sides of the cells. In meiosis I there are 46 chromosomes in duplicates which are present as pairs of sister chromatids. When comes to separation, homologous chromosomes separates only, but not sister chromatids. Homologous chromosomes are present only in meiosis I.

 In anaphase II, since the cell is haploid, there are 23 chromosomes in duplicates, which are present as sister chromatids. So, in this phase, sister chromatids are those who separates. 


4 0
3 years ago
Read 2 more answers
How are amino acids joined together to form a protein?
mash [69]

Answer:

Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid. (from google)

Explanation: hope this helps!  :)

5 0
3 years ago
Read 2 more answers
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