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When the pancreatic beta cells sense an increase in glucose, the release of insulin is facilitated through which of the following mechanisms? a) a decrease in intracellular ATP b) an increase in int
Prokaryotic genes are organized in operons which contain a series of genes that are regulated by a common promoter region.
Question 1: Explain why PSA screening is valuable, and why early detection of prostatic cancer vital. Question 2: Find evidence to support the medical opinion changed recently regarding the use of h
Within the red blood cell NAPDH is required for which of the following processes:-the conversion of pyruvate to acetyl CoA-the oxidation of hemoglobin-the synthesis of ribulose 5-phosphate-the convers
An individual with a deficiency in pyruvate dehydrogenase complex (PDC) will have elevated levels of which metabolite after consuming a meal high in carbohydrates?
Out of 4,737 individuals of European ancestry, 3002 said they could smell asparagus in their urine and 1735 said they could not.If the allele for the ability to smell S is dominant over the alleles f
Describe the pathologic course of genital herpes; explain how it is treated, and if it can be cured. Give at least six possible complications of untreated gonorrhea.
Question: Despite an abundance of habitat, why will it be difficult for the human species to recover?
What is the advantage to having various types of chlorophylls and accessory pigments for the photosynthetic process? a. It allows for a variation in color amongst plants. b. It shifts the equilibrium
n a chloroplast, the stroma is the: a. Central semifluid region b. Stack of thylakoids c. Region between in the inner and outer membranesn d. Cytochromes associated with the thylakoids e. Connection b
Which of the following statements correctly characterizes the relationship between NADP+/NADPH and NAD+/NADH? a. Both are used extensively during photosynthesis in oxygenic phototrophs. b. Only NAD+/N
The endosymbiotic theory states that mitochondria originated from: a. Purple bacteria entering and remaining in the cytoplasm of another cell. b. A routine step in evolution c. The fusion of several p
Which of the following pigments is found exclusively in red algae? a. Phycoerythrin b. chlorophyll a c. lutein d. ?-carotene
The number of chromosomes in a human sperm cell is A) 4 B) 8 C) 23 D) 46
Which of the following is not a characteristic of enzymes? A) they are proteins B) they speed up the rate of chemical reactions C) they act on specific substances called substrates D) they are used
What happens if a red blood cell is placed in a hypotonic solution? A) the cell will shrink B) the cell will swell and may burst C) the cell will remain the same size
Carbon dioxide is released in A) the light-dependent phase of photosynthesis B) the Krebs cycle C) glycolysis D) the Calvin cycle
Yeast cells break down glucose anaerobically into A) ethanol and CO2 B) lactic acid and CO2 C) lactic acid and H2O D) ethanol and H2O
The movement of molecules from a region of low concentration across a membrane to a region of high concentration by use of ATP energy is A) active transport B) diffusion C) passive transport D) osmo
Mitochondria A) package proteins for secretion from cell B) contain chromosomes C) are sites of oxidation of glucose to generate ATP D) synthesize proteins
The main function of a ribosome is to A) extract energy from glucose B) synthesize glucose C) store food in the form of fat D) synthesize proteins
Glycerol is a building block of A) starch B) enzymes C) vegetable oil D) DNA
This polysaccharide forms fibers that are a major component of plant cell walls: A) glucose B) starch C) cellulose D) glycogen
A sodium atom has 11 protons, 12 neutrons, and 11 electrons. The atomic number of sodium is A) 11 B) 12 C) 23 D) 34
In science, a hypothesis must be A) a known fact B) derived from a theory C) testable D) able to be proven absolutely true