In step 4 of the citric acid cycle, the reduction of NAD+ to NADH is coupled to the generation of CO2 and the formation of a high-energy thioester bond. The energy of the thioester bond is harnessed in step 5. What is the energy used for?
(a) to generate a molecule of GTP
(b) to generate a molecule of ATP
(c) to generate a proton gradient
(d) to generate a molecule of NADH
(a)
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In a cow's udder, milk
A. contains Lactococcus. B. contains Lactobacillus. C. is acidic. D. is sterile.
In the periodic table, the value that refers to the number of protons and neutrons is:
A. atomic mass. B. molecular molarity. C. atomic molarity. D. molecular number.
Which of the following statements is false about the
consequences of STD infection? a. Males are more easily infected than females and develop more complications. b. Pelvic inflammatory disease is a complication resulting from some bacterial STDs. c. PID can cause infertility, tubal pregnancies, and chronic pain. d. Early symptoms of type II herpes virus Are often mild or absent. e. Untreated males with chlamydia are at risk for inflammation of the epididymis and infertility.
Messenger RNA is formed by _____ of a gene on the DNA template strand.
A) replication B) transformation C) transcription D) translation