DIVISION OF BIOLOGICAL SCIENCES / 101


ical and physicochemical characteristics of the molecules concerned with heredity,
gene replication, and mutation, and of their biosynthesis and function.
BCH 618-MOLECULAR BIOLOGY 2. 4 credits
 Prerequisites: General course in biochemistry and consent of instructor. Bio-
chemistry of nuclei, ribosomes, mitochondria, chloroplasts, Golgi bodies, lysosomes,
cell walls and membranes; compartmentation and integrated cellular function.
BCH 619-MOLECULAR BIOLOGY 3. 4 credits
 Prerequisites: General course in biochemistry and consent of instructor. The
relationship between cell structure and function: 1) organization of chromosomes,
RNA synthesis, and translation of the genetic code into functional entities; 2)
organization of cellular membranes; 3) ultrastructure, function, and biosynthesis
of sub-cellular organelles; 4) regulatory mechanisms of the cell; correlation of
in vitro and in vivo experiments.


 DIVISION OF BIOLOGICAL SCIENCES
 (College of Arts and Sciences)
 GRADUATE COURSES
 (Cross Departmental)
BLY 605-TROPICAL BIOLOGY: AN ECOLOGICAL APPROACH. 2 to 12 credits
 Identical with BTY 605 and ZY 605. Field study of ecological concepts in
tropical environments. May be repeated with change in content up to a maximum
of 12 credits.
BLY 607-ADVANCED TROPICAL BOTANY. 12 credits
 Identical with BTY 607. Prerequisites: BTY 310; BTY 501 or BTY 542. Topics
changed each year. Topics have been tropical forest ecology, morphology and
biology of tropical monocotyledons, biology of tropical Epiphytes, and biology of
tropical grasses and tropical Pteridophytes. Limit: 10 participants. Offered Summer
Quarter in Costa Rica as part of program of the Organization for Tropical Studies.
BLY 610-ADVANCED TROPICAL ZOOLOGY. 12 credits
 Identical with ZY 610. Vertebrate or invertebrate group selected as basis for
studies of ecological systems in the tropics. Effects of elevation and temperatures
on populations, successions, microhabitat, distribution, predation, evolution and
other aspects. Offered Winter and Summer Quarters in Costa Rica as part of the
program of the Organization for Tropical Studies.

 PROGRAM IN CELLULAR BIOLOGY
 The degree Doctor of Philosophy, with an interdisciplinary specialty in
cellular biology, is offered through the Departments of Botany, Microbiology,
and Zoology. The teaching of graduate courses and supervision of graduate
students is conducted by the following faculty drawn from microbiology,
botany, zoology, immunology and medical microbiology, pathology, and
physiology: Berner, L., Acting Director, Division of Biological Sciences;
Achey, P. M.; Aldrich, H. C.; Brookbank, J. W. (Chairman); Byvoet, P.;
Feldherr, C. M.; Fregly, M. J.; Gregg, J. H.; Moscovici, C.; Nasser, D. S.;
Previc, E. P.; Vasil, I. K.