Molecules that come from the food we eat provide energy for the amazing work that goes on inside of our cells. This energy, stored inside of our food, is a form of _____ .
A) potential energy called chemical energy
B) potential energy called entropy
C) kinetic energy called heat
D) electrical energy called heat
A) potential energy called chemical energy
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Which of the following is incorrect about blood cells?
A. They include glial cells. B. They include leukocytes that are either granulocytes or agranulocytes. C. They develop from undifferentiated stem cells. D. After birth, they are produced in red bone marrow sites. E. They include erythrocytes that, when mature, lose their nuclei.
Which of the following is true concerning the checkpoints in the cell cycle?
A. Mitosis stops if chromosomes are not properly aligned. B. The purpose of the cell cycle checkpoints is to ensure that mitosis results in haploid daughter cells. C. Most cells that undergo mitosis cannot proceed through all the cell cycle checkpoints and end up undergoing apoptosis. D. Mitosis will still occur if the DNA is damaged or not replicated. E. The G1Â checkpoint is located at the tail end of the S phase of interphase.
RNA contains the nitrogenous base ________ instead of ________, which is found only in DNA
A) a deoxyribose sugar... a ribose sugar B) uracil... thymine C) uracil... guanine D) thymine... uracil
________ is the developmental event that results in the formation of a primitive gut and the three tissue layers
A) Induction B) Gastrulation C) Blastulation D) Metamorphosis E) Cleavage