TEAS 7 Science latest February Exam
1. If a portion of a strand of DNA bases reads 5' AGCTAGCGT 3', what would the
sequence of bases on the complementary strand read?
Ans: 3' TCGATCGCA 5'
2. Which of the following substances is excreted by sweat glands in response to the
breakdown of proteins and the formation of ammonia?
Ans: Urea
3. Which of the following processes causes most of the carbon dioxide from the blood
to move into the alveoli?
Ans: Diffusion down a concentration gradient
4. In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of
the following crosses will produce only off spring with smooth leaves?
Ans: ffxff
5. Which of the following is the approximate threshold value for mammalian neurons?
Ans: -55mV
6. In a certain plant, red flowers are dominant over white flowers. A plant
Heterozygous for red flowers and a plant with white flowers are crossed. Which of
the following is the expected proportion of phenotypes in the next generation?
Ans: 4 red, 0 white
7. Which of the following are two major part of the nervous system?
Ans: Peripheral and central nervous system
8. Which of the following statements best supports the hypothesis that virus can cause
cancer?
, Ans: Genes that regulate cell division are found in some viruses
9. Testosterone is categorized as which of the following types of hormones?
Ans: Androgen
10.Which of the following is the main function of centrosomes in animal cells?
Ans: Microtubule organization
11.Which of the following type of cell produce and release antibodies?
Ans: Plasma B cells
12.Which of the following is the structure through which blood exits the glomerulus?
Ans: Efferent arteriole
13.To separate genomic DNA fragments by size, which of these laboratory methods is
most useful?
Ans: Electrophoresis
14.Which of the following allows AIDS virus, which contains RNA, to insert viral DNA
into the DNA of a host T cell after the AIDS virus enters the cells?
Ans: Reverse transcriptase, an enzyme encoded by the virus
15.The following diagram summarizes the carbonic acid ion buffer system of the
blood?
Ans: CO2 + H2O ++ H2CO3 ++ HCO3 + H+
HCO3 + H+ —> H2CO3
16.Which of the following describes the process by which solid carbon dioxide (dry ice)
turns directly into carbon dioxide gas?
Ans: Sublimation
1. If a portion of a strand of DNA bases reads 5' AGCTAGCGT 3', what would the
sequence of bases on the complementary strand read?
Ans: 3' TCGATCGCA 5'
2. Which of the following substances is excreted by sweat glands in response to the
breakdown of proteins and the formation of ammonia?
Ans: Urea
3. Which of the following processes causes most of the carbon dioxide from the blood
to move into the alveoli?
Ans: Diffusion down a concentration gradient
4. In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of
the following crosses will produce only off spring with smooth leaves?
Ans: ffxff
5. Which of the following is the approximate threshold value for mammalian neurons?
Ans: -55mV
6. In a certain plant, red flowers are dominant over white flowers. A plant
Heterozygous for red flowers and a plant with white flowers are crossed. Which of
the following is the expected proportion of phenotypes in the next generation?
Ans: 4 red, 0 white
7. Which of the following are two major part of the nervous system?
Ans: Peripheral and central nervous system
8. Which of the following statements best supports the hypothesis that virus can cause
cancer?
, Ans: Genes that regulate cell division are found in some viruses
9. Testosterone is categorized as which of the following types of hormones?
Ans: Androgen
10.Which of the following is the main function of centrosomes in animal cells?
Ans: Microtubule organization
11.Which of the following type of cell produce and release antibodies?
Ans: Plasma B cells
12.Which of the following is the structure through which blood exits the glomerulus?
Ans: Efferent arteriole
13.To separate genomic DNA fragments by size, which of these laboratory methods is
most useful?
Ans: Electrophoresis
14.Which of the following allows AIDS virus, which contains RNA, to insert viral DNA
into the DNA of a host T cell after the AIDS virus enters the cells?
Ans: Reverse transcriptase, an enzyme encoded by the virus
15.The following diagram summarizes the carbonic acid ion buffer system of the
blood?
Ans: CO2 + H2O ++ H2CO3 ++ HCO3 + H+
HCO3 + H+ —> H2CO3
16.Which of the following describes the process by which solid carbon dioxide (dry ice)
turns directly into carbon dioxide gas?
Ans: Sublimation
