yes
Biceps femoris performs knee flexion.
The biceps femoris are the large muscles in the back of the upper legs, where they connect to the hamstring tendons.(Similarly, the biceps or biceps brachii, are muscles of the upper arm.)
biceps femoris
The biceps femoris is lateral to the semimembranosus. The semimembranosus is closer to the midline of the body.
The biceps femoris is part of the hamstring. The other parts of the hamstring are the semitendonous and the semimembranous.
the hamstring muscles must have these features:they must originate from the ischial tuberosity. they must be inserted into either tibia or fibula.they must not have any attachment to the femur.they must be supplied by the tibial part of the sciatic nerve.they must acts as extensor of the hip joint and flexor of the knee joint.with the above qualifications, the following muscles are considered as the hamstring muscles:semimembranosus.semitendinosus.both are (extensors of hip & flexors & medial rotators of knee joint). long head of biceps femoris