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Questions in biology

[Terjawab] Cell walls of bacteria contain: A. N-acetyl glucosamine B. Muramic acid C. Diaminopimelic acid D. All of the above

[Terjawab] According to the cell theory, which structure contains cells? A. blood B. water C. carbon dioxide D. chromosome

[Terjawab] How does the arrangement of thick and thin filaments contribute to muscle contraction? A. Thin filaments elongate to accommodate muscle contraction. B. The sliding of thin filaments past thick filaments shortens the sarcomere. C. Thick filaments pull apart from each other during contraction. D. Thick and thin filaments contract simultaneously, pulling muscle fibers together.

[Terjawab] Gray matter in the brain, which is reduced as we age, is responsible for which of these? A. organization and planning B. memory C. inhibitions D. processing new experiences

[Terjawab] A group of three nucleotides is called a(n) A) Codon B) Anticodon C) Exon D) Intron

[Terjawab] How many Great Indian Bustards are left in the world now?

[Terjawab] Which of the following processes is the complete removal of micro-organisms using heat, ionizing radiation, or chemicals? A. Sterilization B. Disinfection C. Medical asepsis D. Sanitization

[Terjawab] Read the summary of an online article. Answer the question that follows. Environmentalist Dr. Stocks monitored and tracked the issues facing the bald eagle population in the United States. Their shrinking population is largely due to overhunting, habitat destruction, and pesticide use. What is the text structure of this essay? A. Cause and effect B. Chronological C. Description D. Sequence

[Terjawab] Which part of the muscle does the term 'insertion' refer to? A. The end that moves during muscle contraction. B. The tendon attaching muscle to bone. C. The end that remains stationary during contraction. D. The muscle belly itself.

[Terjawab] The _____ is the base of the brainstem. A. thalamus B. medulla C. cerebellum D. reticular formation