Children born with fetal alcohol syndrome have
A. cognitive disorders.
B. three copies of chromosome 21.
C. a gap between the mouth and nasal cavity.
D. a gap in the posterior region of the neural tube.
E. All of the above.
A. cognitive disorders.
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Which of the following is a component of a vertebrate kidney (select all correct choices)?
A. glomerulus B. Bowman's capsule C. renal tubules D. collecting ducts E. Malphigian tubules
Microorganisms were inoculated on two agar plates and incubated for 24 hours. After incubation, no microbial colonies were seen on the spread plate agar, but three microbial colonies were seen in the pour plate agar. What may account for this observation and how can growth of this microorganism be enhanced?
What will be an ideal response?
In the mitochondria pyruvate molecules are converted into ____________________ molecules, which can enter the
Krebs cycle reactions. Fill in the blank(s) with the appropriate word(s).
A single PR protein is composed of four identical polypeptide chains that act together to bind DNA. What is the highest level of protein structure that the PR proteins have?
A) primary B) secondary C) tertiary D) quaternary