Home
Class 12
BIOLOGY
Proto-oncogenes are...

Proto-oncogenes are

A

Normai genes which control cell growth and differentiation

B

Mutated genes which cause cancer

C

Viral genes which cause cancer

D

Genes which cause metastasis under normal conditions

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question "Proto-oncogenes are," we will analyze each option provided and determine which one correctly defines proto-oncogenes. ### Step-by-Step Solution: 1. **Understanding Proto-oncogenes**: - Proto-oncogenes are normal genes found in the body that play a crucial role in regulating cell growth and differentiation. They are essential for normal cellular functions. 2. **Analyzing the Options**: - **Option a**: Normal genes which control cell growth and differentiation. - This option aligns with the definition of proto-oncogenes. They help regulate normal cell functions and prevent uncontrolled growth. - **Option b**: Mutated genes which cause cancer. - This describes oncogenes, which are mutated forms of proto-oncogenes that can lead to cancer. Therefore, this option is incorrect for proto-oncogenes. - **Option c**: Viral genes which cause cancer. - This option refers to viral oncogenes, not proto-oncogenes. Proto-oncogenes are not viral in origin, so this option is also incorrect. - **Option d**: Genes which cause metastasis under normal conditions. - Metastasis refers to the spread of cancer cells to other parts of the body. Proto-oncogenes do not cause metastasis under normal conditions; they are involved in normal cell regulation. Thus, this option is incorrect. 3. **Conclusion**: - After analyzing all the options, the correct answer is **Option a**: Normal genes which control cell growth and differentiation. ### Final Answer: Proto-oncogenes are **normal genes which control cell growth and differentiation** (Option a).
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 36

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|35 Videos

  • MOCK TEST 38 ZOOLOGY

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|20 Videos

Similar Questions

Explore conceptually related problems

How are oncogenic viruses different from proto-oncogenes ?

Which genes are involved in the conversion of proto-oncogenes into oncogenes

Which of the following characteristics are found in a healthy cell ? A. Metastasis B. Presence of contact inhibition C. Presence of proto - oncogenes D. Uncontrolled cell division

What do cellular oncogenes code for in normal cells?

Oncogenic viruses are harmful and can cause tumor in

Genes in the normal cells which when activated lead to oncogenic transformation are called

Mutualism is an ul(x) whereas proto-co-operation is a ul(y) relation in which both interacting species are benefitted.

HIV/oncogenic viruses/retroviruses are dangerous and cause disorder in

Certain hormones also act as tumour promoters and also oncogenic growth factors. Which statement is correct in this context ?

Read the following statements carefully. (i) Cancer causing viruses have genes called viral oncogenes. (ii) Malignant tumors remain confined to their original location. (iii) Cancer cells do not exhibit contact inhibition. (iv) X-rays and UV rays are not potent carcinogens. (v) Cancer detection is based on biopsy. Which of the above statements are not correct regarding cancer ?