10. The cell nucleus:
а) is the smallest organelle
b) contains DNA
c) contains lysosomes
d) is a nonmembraneous organelle - ANSWER b) contains DNA
11. Albinism is a defect in the synthesis of:
а) hemoglobin
b) melanin
c) keratin
, d) fibrin - ANSWER b) melanin
12. Mammals excrete sperm cells only during the process of:
а) fertilization
b) erection
c) spermatogenesis
d) ejaculation - ANSWER d) ejaculation
13. During meiosis the number of chromosomes is:
а) reduced
b) duplicated
c) fused
d) degraded - ANSWER а) reduced
14. Double membrane organelles are:
а) plastids
b) flagella
c) peroxisomes
d) mitotic spindles - ANSWER а) plastids
15. Replication is the synthesis of:
а) glycogen
b) DNA
c) proteins
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