A. usually accompanied by dull pain
Hamstring strains are
accompanied by sudden and severe pain during exercise they may possible
include a snapping or popping feeling.
Answer:
The triceps are the extensor muscles of the elbow joint.
Answer:
Gonorrhea.
Explanation:
Sexual transmitted infections (STIs) are the disease that might pass from one sex partner to the other partner during unprotected sex. Some STIs can pass through skin contact.
Gonorrhea is the STIs that occur due to the bacterial infections. This can affect both the male and female partner. The gonorrhoea infection do not show any symptoms and sometimes the partner do not know about the infection. In severe cases the individual may get sterile by the gonorrhea infection.
Thus, the correct answer is option (c).
Answer:
In the case of HIV-1, this loss-of-function mutation has proven to be beneficial.
Explanation:
Loss-of-function mutations are those that result in a gene product that has less or no function compared to the unmutated gene. When the allele completely loses function, (null allele), it is called an amorphous mutation. Phenotypes associated with these mutations are usually recessive, except when the organism is haploid, or when the reduced dosage of the normal gene is not sufficient to produce a normal phenotype (this phenomenon is called haploinsufficiency).
As mentioned earlier, this type of mutation results in a defective gene, but the text shown in the above question shows an example of a beneficial loss-of-function mutation because this mutation provides resistance to HIV-1 infection.
