Home
Class 12
BIOLOGY
An animal cell was grown in a culture me...

An animal cell was grown in a culture medium containing `P^(32)` nucleotides, the parts from which DNA is built. Later examination of the cell showed the radioactivity to be concentrated in the

A

Golgi body

B

nucleus

C

rough ER

D

smooth ER

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the information provided and understand the role of the components mentioned in the options. ### Step-by-Step Solution: 1. **Understanding the Context**: The question states that an animal cell was grown in a culture medium containing P-32 nucleotides. P-32 is a radioactive isotope of phosphorus that is often used in molecular biology to label nucleotides. 2. **Role of Nucleotides in DNA**: Nucleotides are the building blocks of DNA. When cells synthesize DNA, they incorporate nucleotides into the DNA strand. Therefore, if the cell is exposed to P-32 nucleotides, the newly synthesized DNA will incorporate these labeled nucleotides. 3. **Location of DNA in Animal Cells**: In animal cells, DNA is primarily located in the nucleus. The nucleus is the organelle responsible for housing the genetic material of the cell. 4. **Examining the Options**: - **a. Golgi body**: The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids, not in DNA synthesis. - **b. Nucleus**: The nucleus is where DNA is stored and synthesized. Since the P-32 nucleotides are incorporated into DNA, we would expect to find the radioactivity concentrated here. - **c. Rough ER**: The rough endoplasmic reticulum is primarily involved in protein synthesis and does not play a direct role in DNA synthesis. - **d. Smooth ER**: The smooth endoplasmic reticulum is involved in lipid synthesis and detoxification processes, not in DNA synthesis. 5. **Conclusion**: Since the radioactive nucleotides are incorporated into the DNA during synthesis, and DNA is located in the nucleus, we conclude that the radioactivity will be concentrated in the nucleus. ### Final Answer: The radioactivity is concentrated in the **b. Nucleus**. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Radioactively - labelled d- nucleotides are introduced into a cell. In which cell structures will the radioactively first become concentrated ?

In which part of the cell is DNA concentrated ?

In which part of the cell is DNA concentrated?

Animal cells are suspended in a culture medium that contains excess glucose. The graph below shows glucose utilisation under different growth conditions (A),(B), and (C) in the graph indicate

A bacterium divides every 35 minutes. If a culture containing 10^(5) cells/ml is grown for 175 minutes. What will be the cell concentration / ml after 175 minutes

A bacterium divides every 35 minutes. If a culture containing 10^(5) cells/ml is grown for 175 minutes. What will be the cell concentration / ml after 175 minutes

A bacterium divides every 35 minutes. If a culture containing 10^(5) cells/ml is grown for 175 minutes. What will be the cell concentration / ml after 175 minutes

A bacterium divides every 35 minutes. If a culture containing 10^(5) cells/ml is grown for 2 hours 55 minutes, what will be the cell concentration per ml?

A scientist was studying the production of a protein that was released by an animal cell into a culture medium, she found that the protein only appeared in the culture medium after the added a few drops of a hormone to the cell. Before adding the hormone, she labelled the protein inside the cell with a fluorescent dye and looked at the cell under the lgiht microscope. The dye was seen in flattened sheets and tube. like structures throughout the cell, and in stacks of flattened sac-like structures. after adding the hormone, the dye was aslo seen as small dots clustered against the cell membrane, Which statement most likely explains these observations?

There are 5 test tubes having a culture medium containing rough colonies of streptococcus pneumoniae. The following substances were added in them. Which of these test tubes will show smooth colonies of streptococcus pneumoniae on incubation for some time? Test tube I: RNA from a heat-killed smooth strain of streptococcus pneumoniae Test tube II: DNA from a heat-killed smooth strain of streptococcus pneumoniae Test tube III: Protein from a heat-killed smooth strain of streptococcus pneumoniae Test tube IV: Carbohydrate from a heat-killed smooth strain of streptococcus pneumoniae Test tube V: Heat killed smooth strain of streptococcus pneumoniae incubated with DNAse enzyme