Polyploidy is characterized by ____
a. the failure of homologous chromosomes to separate properly during meiosis
b. a condition in which one chromosome is present in three copies
c. a condition in which one member of a chromosomal pair is missing
d. a chromosomal number that is not an exact multiple of the haploid set
e. a chromosomal number that is a multiple of the normal haploid chromosomal set
e
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If a given protein’s level peaks early in G1, but is absent before the G2 transition, what can be inferred about its possible role in regulating the cell cycle?
a. This protein inhibits Cdk1. b. This protein activates Cdk1. c. This protein inhibits Cdk2. d. This protein activates Cdk2. e. This proteins is involved in DNA synthesis.
Bacteria ____
a. are haploid b. are diploid c. are polyploid d. have double-stranded RNA genomes e. have single-stranded DNA genomes
Answer the question using the accompanying figure. What does letter E represent?
a. different RNA molecules transcribed from a coding region of DNA b. the products of a PCR reaction in which the primers annealed to multiple sites c. the products of a PCR reaction performed without one of the nucleoside triphosphates d. the products of a PCR reaction that had more than two primers e. a DNA marker ladder
where in plants does
1.photosynthesis occur? 2.gas exchange (O2 CO2)