What is the photopigment in rod cells called?

A. Photopsin
B. Melanin
C. Rhodopsin
D. Opsin
E. Carotene


Answer: C

Biology & Microbiology

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Refer to the figure above. The mRNA is smaller than the length of the DNA that codes for it because _____

A) the regulatory regions (exons) of the gene are not transcribed B) post-transcriptional modification removes the introns C) post-transcriptional modification removes the exons D) bases are added to the tail of the primary transcript

Biology & Microbiology

A road that dichotomizes is

a. an intersection of two crossroads. b. a road that forks into two roads. c. a road that has numerous entrances and exits. d. a road that leads nowhere.

Biology & Microbiology

The specific process by which a caterpillar becomes a butterfly is called

A. cellular differentiation. B. gastrulation. C. metamorphosis. D. involution. E. epigenesis.

Biology & Microbiology

What is the last structure that a sperm travels through as it leaves the body?

A. Ureter B. Urethra C. Vas deferens D. Ejaculatory duct E. Epididymis

Biology & Microbiology