Due to the lack of an enzyme to break down lipids, excess accumulation of lipids in the brain leads to a human disease called Tay-Sachs syndrome. The organelle(s) most likely to lack the proper enzyme needed for lipid breakdown is/are

A. lysosomes.
B. tonoplasts.
C. mitochondrion.
D. Golgi apparatus.
E. peroxisomes.


A. lysosomes.

Biology & Microbiology

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If a diploid organism has a genome consisting of 4

pairs of chromosomes, it can produce __________ different combinations of maternal and paternal chromosomes (disregarding crossing over). a. 4 b. 8 c. 12 d. 16 e 32

Biology & Microbiology

A sprinter would have a high proportion of __________, and a marathon runner would have a high

proportion of __________. a. red fibers; white fibers b. fast-oxidative fibers; slow-oxidative fibers c. red fibers; fast-oxidative fibers d. red fibers; slow-oxidative fibers e. slow-oxidative fibers; slow-oxidative fibers

Biology & Microbiology

Translocation occurs when:a

part of a chromosome breaks off and attaches to a nonhomologous chromosome. b. part of a chromosome breaks off and attaches to a homologous chromosome. c. crossing-over events occur. d. genes move from one area on a chromosome to another area on the same chromosome. e. a Y chromosome replaces an X chromosome in a female cell.

Biology & Microbiology

Of the following groups, which have been in existence the longest?

A) multicellular animals B) gastropods C) green algae D) cyanobacteria

Biology & Microbiology