During interphase, individual chromosomes are not visible, and the chromatin appears diffuse and unorganized.
Q. Are chromosomes visible all the time?
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.
Table of Contents
- Q. Are chromosomes visible all the time?
- Q. What are the chromosomes not visible in most cells?
- Q. Are chromosomes always present in a cell?
- Q. When and how can a chromosome be visualized?
- Q. Is DNA in the chromosomes?
- Q. What color is DNA normally?
- Q. Can you see DNA?
- Q. What does DNA look like in a cell?
- Q. Why does DNA look like a twisted ladder?
- Q. What atoms make up DNA?
- Q. Which base is found only in DNA?
- Q. What are 4 bases found in DNA?
- Q. Which base is found exclusively in DNA and not in RNA?
- Q. Which base is found only in DNA but not in RNA?
- Q. Which of the nitrogenous base is not present in DNA?
- Q. Where is RNA found in the cell?
Q. What are the chromosomes not visible in most cells?
During most of the cell cycle, interphase, the chromosomes are somewhat less condensed and are not visible as individual objects under the light microscope. However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells.
Q. Are chromosomes always present in a cell?
Chromosomes are not always visible. They usually sit around uncoiled and as loose strands called chromatin. When it is time for the cell to reproduce, they condense and wrap up very tightly. The tightly wound DNA is the chromosome.
Q. When and how can a chromosome be visualized?
During interphase (1), chromatin is in its least condensed state and appears loosely distributed throughout the nucleus. Chromatin condensation begins during prophase (2) and chromosomes become visible.
Q. Is DNA in the chromosomes?
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA).
Q. What color is DNA normally?
DNA Model
| Nucleotide Component | Quantity | Color |
|---|---|---|
| Adenine | 6 | BLUE |
| Cytosine | 6 | RED |
| Guanine | 6 | GREEN |
| Phosphate | 25 | BLACK |
Q. Can you see DNA?
Given that DNA molecules are found inside the cells, they are too small to be seen with the naked eye. While it is possible to see the nucleus (containing DNA) using a light microscope, DNA strands/threads can only be viewed using microscopes that allow for higher resolution.
Q. What does DNA look like in a cell?
The DNA molecule is a double helix: that is, two long, thin strands twisted around each other like a spiral staircase. The sides are sugar and phosphate molecules. The rungs are pairs of chemicals called ‘nitrogenous bases’, or ‘bases’ for short.
Q. Why does DNA look like a twisted ladder?
Phosphates and sugars of adjacent nucleotides link to form a long polymer. They showed that alternating deoxyribose and phosphate molecules form the twisted uprights of the DNA ladder. The rungs of the ladder are formed by complementary pairs of nitrogen bases — A always paired with T and G always paired with C.
Q. What atoms make up DNA?
DNA, which stands for deoxyribonucleic acid, resembles a long, spiraling ladder. It consists of just a few kinds of atoms: carbon, hydrogen, oxygen, nitrogen, and phosphorus. Combinations of these atoms form the sugar-phosphate backbone of the DNA — the sides of the ladder, in other words.
Q. Which base is found only in DNA?
thymine
Q. What are 4 bases found in DNA?
Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Q. Which base is found exclusively in DNA and not in RNA?
Uracil is the nitrogenous base present only in RNA, but not in DNA. Thymine is in DNA. DNA have thymine, guanine, adenine and cytosine.
Q. Which base is found only in DNA but not in RNA?
The four bases of DNA are adenine, thymine, cytosine, and guanine, abbreviated A, T, C, and G respectively. In RNA, the base thymine is not found and is instead replaced by a different base called uracil, abbreviated U. The other three bases are present in both DNA and RNA.
Q. Which of the nitrogenous base is not present in DNA?
Answer. Explanation: ✏Uracil isn’t a nitrogen base,whereas adenine,thymine, guanine and cytosine are the four nitrogenous bases.
Q. Where is RNA found in the cell?
cytoplasm
