Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 1497
TLS Online TPP Program

#Question id: 1522

Conversion of a proto-oncogene into an oncogene, also called activation, generally involves a gain-of-function mutation. Following statements are regarding to the mechanisms that produce oncogenes from the corresponding proto-oncogenes.

A. A change in a single base pair in a proto-oncogene that results in a hyperactive or constitutively active protein product.

B. A chromosomal translocation that fuses two genes together to produce a hybrid gene encoding a chimeric protein whose activity, unlike that of the parent proteins, is permanently suppress.

C. A chromosomal translocation that brings a growth regulatory gene under the control of alternative enhancers that cause inappropriate expression of the gene.

D. Amplification of a DNA segment including a proto-oncogene so that numerous copies exist, leading to overproduction of the encoded protein.

Which of the following statements are correct?

#Unit 4. Cell Communication and Cell Signaling

  1. A, B and C

  2. B and D only

  3. A, C and D

  4. A and C only

More Questions
TLS Online TPP Program

#Question id: 31106

#Unit 2. Cellular Organization

Which of the following protein can bind other proteins with sequences rich in proline residues at the same time it is binding actin?
TLS Online TPP Program

#Question id: 5741

#Unit 8. Inheritance Biology

In a mammal 2 Barr bodies are observed.  How many X chromosomes does the organism have?
TLS Online TPP Program

#Question id: 7068

#Unit 5. Developmental Biology

In sea urchin gene regulatory network (GRN) is
TLS Online TPP Program

#Question id: 15378

#Unit 8. Inheritance Biology

You find a pink geranium in your flowerbed of red geraniums. Seeds from self fertilization of this plant produce ¼ red plants, ½ pink plants, and ¼ white plants. When considering the visible phenotype, which explanation is most likely?
TLS Online TPP Program

#Question id: 10962

#Unit 7. System Physiology – Animal

A 24-year-old man came into the ER with a broken leg. A blood test was ordered and his WBC count was 22 × 10^3/μl. Five hours later, a second blood test resulted in values of 7 × 10^3/μl. What is the cause of the increased WBC count with the first test?