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liq [111]
4 years ago
10

What are potential sources of error in a experiment?

Biology
1 answer:
Anastaziya [24]4 years ago
6 0
No control variable 

no hypothesis

only performed once
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Which nitrogenous bases are needed to complete the DNA strand pictured below?
Paul [167]

Explanation:

Template: T, A, C, G

Pairing: T- A, A-T, C-G, G-C

Answer: adenine, thymine, guanine, cytosine

Further explanation:

Nucleic acids are comprised of smaller units called nucleotides and function as storage for the body’s genetic information. These monomers include ribonucleic acid (RNA) or deoxyribonucleic acid (DNA). They differ from other macromolecules since they don’t provide the body with energy. They exist solely to encode and protein synthesis.

Basic makeup: C, H, O, P; they contain phosphate group 5 carbon sugar, these nitrogen bases which may contain single to double bond ring.

DNA stores all of an organism’s genetic information. Its molecules comprise the nitrogenous bases Guanine, Adenine, Cytosine and Thymine. These pair up as base pairs due to their varied structure- largely influenced by the location of N molecule ;

  • cytosine and thymine are formed from pyrimidines- N at position 1 and 3 of a fused ring;
  • Guanine and adenine are formed from organic compounds called purines (pyramidines fused to another organic ring of imidazole)
  • Each base pair contains a purine and pyrimidine joined via hydrogen bonding e.g. A-T & G-C and are called base complements.

In certain combinations, these bases form codons which act as instructions for protein synthesis. Codons are three nucleotide bases encoding an amino acid or signal at the beginning or end of protein synthesis.

Learn more about transcription at brainly.com/question/11339456

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

7 0
3 years ago
Classify each cell as haploid or diploid. 1. microspore:
Alex17521 [72]

Answer:

microspore: haploid

2. first polar body: haploid

3. spermatid: haploid

4. ovum: haploid

5. secondary oocyte: haploid

6. primary spermatocyte: diploid

7. microsporocyte: diploid

8. oogonium: diploid

9. megaspore: haploid

10. spermatogonium: diploid

Your answer

Explanation:

1. Microspore is a haploid spore produced by mostly ferns. They give rise to male gametophytes, which in turn produces sperm cell.

2. Polar body is one of the haploid cells that forms during the process of oogenesis (gametogenesis), specifically when the primary oocyte undergoes an unequal division.

3. A spermatid is an haploid cell that arises from the second meiotic division of the spermatogonia.

4. The ovum is the female gamete of most sexual reproducing organisms. It is also called the EGG CELL. It is haploid.

5. Secondary oocyte are haploid cells that results from the meiotic division of the primary oocyte.

6. Primary oocyte is the diploid cell that starts the meiotic division during oogenesis. It arises from the mitotic division of the oogonium.

7. The microsporocyte is the diploid cell that undergoes meiotic division to produce microspores in ferns and other land plants.

8. Oogonium are the diploid stem cells that initially starts the oogenesis process. It undergoes mitosis to form the primary oocyte, which divides meiotically till the ovum is formed.

9. Megaspore is a haploid spore that gives rise/germinates to the female gametophyte in ferns. The female gametophyte produces the haploid eggs.

10. Spermatogonium are undifferentiated stem cells that produces the sperm cells in males via the process of spermatogenesis. The spermatogonia is diploid in nature

5 0
3 years ago
class 6 subject science local unit of measurement and standard unit of measurement difference between ​
Ostrovityanka [42]

Explanation:

1)the system of measurement which are used by local people in a certain part of world is called local system of measurement.

-The units of measurement which are same throughout the world and accepted by most of people is called standard units of measurement.

2) The local system of measurement are not accurate and reliable.

-The standard units of measurement are accurate and reliable.

3) examples of local system-pathi,muri,pau,etc.

examples of standard system-metre,kilogram, second,etc

HOPE IT HELPS YOU

3 0
3 years ago
What is the minimum number of daily kcals necessary to ensure nutritional adequacy in an eating plan for reducing weight?
gulaghasi [49]
1600 kcals in the average man
5 0
3 years ago
Which of the following roles do the lysosomes perform? Will give brainliest!
umka21 [38]

Answer:

D Break down stored food molecules to be used for the formation of ATP.

3 0
3 years ago
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