Question

Question 18 (2 points) Which of the following is a characteristic of cancer cells? a) transplantable Ob) lack of contact inhibition c) induce angiogenesis d) have controlled growth e) all of the above except D Question 19 (2 points) A gatekeeper gene a) releases microRNAs that trigger parts of the cell membrane to open. b) regulates its own mutation rate. 3 c) can destabilize the genome when mutant. d) regulates mitosis and meiosis. e) regulates apoptosis and mitosis.

Answer 1

Ques 18:- Option E is correct.

Cancer is uncontrolled cell growth. Mutations in these genes can root cancer by accelerating cell division rates or inhibiting normal controls in the system.

Characteristics of cancer cells:- Cancer cells grow and divide at an abnormally rapid rate, poorly differentiated & have abnormal membranes and morphology. The abnormality in cells can be progressive with a slow transition from normal cells to benign tumors to malignant tumors.

Ques 19:- Option E is correct.

Gatekeepee genes inhibit cell growth or apoptosis.

Apoptosis:- is a form of organised cell death that generally occurs in multicellular organisms.