The structure that stores sperm and allows maturation is the:
A. Vas deferens
B. Prostate gland
C. Epididymis
D. Seminal vesicle
Answer: Option C
Solution (By JKSSB Mock Tests)
The epididymis is a coiled tube on the testis where sperm mature and are stored. Seminal vesicles and prostate add fluid, vas deferens transports sperm.
Explanation:
Max Theiler developed the attenuated yellow fever vaccine (17D strain) in the 1930s, winning the Nobel Prize. Pasteur rabies, Jenner smallpox, Salk polio.
Explanation:
Amphibians like frogs have a three-chambered heart (two atria, one ventricle) with some mixing of blood. Humans and pigeons have four-chambered hearts, crocodiles uniquely have a four-chambered heart among reptiles.
Explanation:
Helicase uses ATP to separate the hydrogen-bonded base pairs, creating the replication fork. Topoisomerase relieves supercoiling ahead of the fork. DNA polymerase synthesizes new DNA, ligase joins fragments. Helicase is essential for strand separation and replication initiation.
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