If a portion of a strand of DNA bases reads 5' AGCTAGCGT 3', what would the sequence of bases on the complementary strand read?
3' TCGATCGCA
... [Show More] 5'
Which of the following elements has the smallest atomic radius?
C
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Which of the following substances is excreted by sweat glands in response to the breakdown of proteins and the formation of ammonia?
urea
Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?
diffusion down a concentration gradient
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?
ffxff
Which of the following is the approximate threshold value for mammalian neurons?
-55mV
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?
4 red, 0 white
Which of the following are two major part of the nervous system?
peripheral and central nervous system
Which of the following statements best supports the hypothesis that virus can cause
cancer?
Genes that regulate cell division are found in some viruses
Testosterone is categorized as which of the following types of hormones?
Androgen
Which of the following is the main function of centrosomes in animal cells?
Microtubule organization
Which of the following type of cell produce and release antibodies?
Plasma B cells
Which of the following is the structure through which blood exits the glomerulus?
efferent arteriole
To separate genomic DNA fragments by size, which of these laboratory methods is most useful?
electrophoresis
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?
Reverse transcriptase, an enzyme encoded by the virus
The following diagram summarizes the carbonic acid ion buffer system of the blood?
CO2 + H2O ++ H2CO3 ++ HCO3 + H+
HCO3 + H+ —> H2CO3
Which of the following describes the process by which solid carbon dioxide (dry ice) turns directly into carbon dioxide gas?
sublimation
Which of the following describes why water has a concave, or downward-curving, meniscus when poured in a glass beaker?
The adhesive forces with the glass are greater than the cohesive forces
Which of the following actions does a hydrophilic hormone takes to activate a target cell?
the hormone binds to the cell surface receptors of the target cell
Which of the following best describes adaptive immunity?
A response to specific traits of specific pathogens
Permanent damage to which of the following types of tissues in the spinal cord will cause paralysis?
nervous tissue
Which of the following describes the function of tendons?
Tendons attach skeletal muscles to bones
Histones are proteins associated with which of the following?
DNA
The shortening of a sarcomere in skeletal muscle is directly due to the interactions of which of the following?
Myosin and actin
Which of the following occurs during inhalation?
The diaphragm moves downward
Which of the following structures is a flap of cartilage that prevents the movement of food into the trachea?
epiglottis
A group of students perform an experiment to test terminal velocity which is known the greatest speed obtained by a falling object. The students dropped different numbers of coffee filters and and measured the resulting terminal velocity. Which of the following conclusions is supported by then following data in tHe following data table?
Terminal velocity is when the force of gravity is equal to air resistance
Which of following substances protects the skin from ultraviolet radiation?
Melanin
Which of the following microorganisms lack their own metabolic pathways and can only reproduce?
A. Virus
B. Bacteria
C. Parasites
D. Protist
A. Virus
Which of the following microorganisms lack mitochondria?
A. Fungi
B. Bacteria
C. Parasites
D. Protists
B. Bacteria
Which of the following is a part of the pulmonary circuit?
pulmonary vein
Lifelong protection after exposure to a virus such as chickenpox is due to which of the following types of immunity ?
active
Which of the following body cavities is subdivided into the thoracic and abdominopelvic cavities?
ventral
An equal mass of which of the following states of matter could completely fill either a 100 mL or 500 mL container?
Gas
Which of the following vessels is responsible for carrying blood from the upper body to the right atrium of the heart?
superior vena cava
Which of the following pancreatic secretions digest starch into disaccharides?
amylase
Which of the following body systems develops from the same origin tissues as the lungs?
gastrointestinal system
A researcher collects high - resolution photographs of the earth taken from outer space at annual intervals for the last decades . This data would be most useful to analyse which of the following ?
Weather patterns during hurricanes
During muscle contractions, myosin is directly responsible for which of the following?
Forming cross bridges with actin molecules
Carbon has an atomic number of 6. Which of the following is true about the isotope C-12?
C-12 possesses 6 neutrons and 6 protons in its nucleus
Mutation in which of the following types of cells can be inherited by offspring?
Ovarian
A student investigating the importance of wavelengths above and below the visible spectrum for photosynthesis sets up an experiment as followers over a 2-month period, all with illumination at 1 meter distance from plants grown with the same soil and watering condition.
3 Arabidopsis plants exposed to ultraviolet light(uv)
3 Arabidopsis plants exposed to infared light (IR)
3 Arabidopsis plants exposed to white light
at the end of the experiment, she first finds that The IR treated plants, are scorched, the uv treated plants have wilted, but the white light-treated plants are growing normally.
Wavelengths of light is the only variable that has been changed between groups
Which of the following statements about COVID-19 vaccine initiation is supported by the data in the chart below?
The cumulative total fell by 2 million between January 9 and January 10
Which of the following is true if Koch's postulates are met regarding a disease?
The disease is hereditary
A vasectomy is a procedure in which the vas deferens are cut. Which of the following describes why a vasectomy leads to infertility?
The vasectomy blocks movement of sperm from a testis into the epididymis [Show Less]