A mutagenic factor that can alter DNA by the loss of a chromosome segment is known as
A. translocation
B. crossing over
C. deletion
D. nondisjunction
Answer: C. deletion
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Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?
A) ribosome B) lysosome C) smooth endoplasmic reticulum D) mitochondrion E) contractile vacuole
How do protostomes and deuterostomes differ in the timing of important developmental events?
What will be an ideal response?
Plasma is the fluid portion of blood
Indicate whether the statement is true or false.
Which of the following statements about collagen is false?
a. It is the most abundant protein in animal tissues. b. It forms a double helix, with two collagen molecules wrapped around each other in a ropelike structure. c. It contains an amino acid called hydroxyproline. d. It is a secreted protein.