The difference between benign and malignant tumors is: Malignant tumors are life
ID: 267539 • Letter: T
Question
The difference between benign and malignant tumors is:
Malignant tumors are life threatening and benign tumors are not.
Benign tumors spread more slowly.
Benign tumors are not contained.
Malignant tumors are not contained.
Genes that regulate cell numbers by inhibiting division are called:
Oncogenes
Tumor suppressor genes
Proto-oncogenes
Metastasis genes
Genetic counseling is best suited for:
Couples where one of the mates has a sibling with cystic fibrosis
Anyone interested in knowing more about a genetic trait that runs in their family
Women of advanced maternal age needing consultation about the risk of Down syndrome and their unborn child
All of the above
Chromosomes other than the sex chromosomes are called:
Autosomes
Mesosomes
Somatic chromosomes
None of the above
A retrovirus contains :
DNA only
RNA only
Both DNA and RNA
Either DNA or RNA
All of the genes in a population comprise its:
gene pool
genotype
genome
gene frequency
A "cold hit" refers to:
a DNA profile made from frozen DNA
identifying a suspect from DNA alone
a technology used to preserve DNA found at crime scenes
using mtDNA to generate a profile
Clines are created when:
emigrants remove alleles and immigrants introduce alleles
immigrants remove alleles and emigrants introduce alleles
different genes mutate in different geographical regions
none of the above
If a dominant allele is in 85% of a population (p= 0.85), what percentage of the population will have the recessive allele according to the HW equation?
0%
15%
85%
100%
An RFLP is a
DNA probe
variation in size of a DNA segment when cut by a restriction enzyme
type of restriction enzyme
type of copy number variant
The study of the factors that control or contribute to a disease is called:
Epidemiology
Cardiology
Oncology
none of the above
Explanation / Answer
Ans 1- malignant tumors are life threatening and benign tumours are not
Among all the four options given this is the best option to explain the difference between benign and malignant tumors.
Ans 2- tumour suppressor genes (TSGs)
Tumour suppressor genes are regulatory genes of cell cycle. If they get mutated cells become cancerous and can grow uncontrollably.
Proto-oncogenes are genes that gets converted to oncogene upon mutation and causes cancer, these are basically normal genes that remains silent in our genome
Metastasis genes forms proteins that help tumour cells to invade different organs of body.
Ans 4- autosomes
All the chromosomes in body other than sex chromosomes are known as autosomes.
They are found in somatic cells but somatic chromosomes are not their correct nomenclature.
Mesosomes are infolding of plasma membrane.
Ans 5- RNA only
Retroviruses are single stranded RNA viruses that form DNA from RNA by reverse transcriptase enzyme.
Herpes virus are viruses that contain DNA as their genetic material.
Any virus can have only one type of genetic material either DNA or RNA not both.