Download Exam 3 Questions for Monday Feb 4th

Name: ________________________________________ Date: _____2/1/13_____
AP Biology Exam 3 - Quarter 2
Directions: Answer each question below. Read ALL the choices first.b
1. Using images and bullets, show how a hormone like adrenaline can signal a liver
cell to break down glycogen to glucose-1-phosphate. The adrenaline receptor is a
GPCR. Make sure the following terms are included: GPCR, protein kinase A,
glycogen phosphorylase (the enzyme that breaks down glycogen), cAMP, ATP, G
protein, GTP, GDP, conformational change (CC), second messenger, integral
membrane protein (IMP), peripheral membrane protein (PMP), adenylyl cyclase.
If you have no clue, you can describe one of the other possibilities: RTK’s or the
GPCR/Ca++/IP3 pathway, but you do not have the luxury of a word list.
ESSAY QUESTION
A) Explain how gametes are made from a single somatic diploid cell (meiotic cell
division). You will be required to draw and label a cell for each subphase (G1, S, G2, PI,
MI, AI, TI/cytokinesis, PII, MII, AII, TII/cytokinesis). Make sure you draw the final
gametes. Do not leave them hanging in TII/cytokinesis. Because meiosis II happens twice
at the same time, you only need to draw it once and say that is happens twice. Under each
image should be a set of bullets describing what is happening in that image. MAKE
SURE YOU INDICATE THE PLOIDY OF EVERY IMAGE. You need only label a
structure once. The starting cell will have a haploid number of 3 (this could change…be
prepared for anything).
(The following terms should be included: haploid, diploid, synapsis, tetrad, homologous chromosomes,
crossing-over, centrosomes, mitotic spindle, kinetochores, motor proteins, centromere, microtubules,
metaphase plate, sister chromatids, chiasma, recombinant chromosome, meiosis I and associated subphases,
meiosis II and associated subphases, chromatin, nuclear envelope, tetrad, sister chromatids, daughter
chromosomes, MTOC, microtubules, spindle fibers, poles, cleavage furrow, centrioles, aster, ATP, plasma
membrane, DNA replication, centrosome replication)