Abiogenesis:
Refers to the spontaneous generation of organism from nonliving matter
Explain the development of life forms from preexisting life forms
Only takes place in the absence of aseptic technique
Was supported by Pasteur's swan-necked flask experiments
The Correct Answer is A
A. Refers to the spontaneous generation of organism from nonliving matter: Abiogenesis historically denotes the idea that life can arise spontaneously from nonliving material.
B. Explain the development of life forms from preexisting life forms: This describes biogenesis -the concept that life arises from existing life.
C. Only takes place in the absence of aseptic technique: Abiogenesis is a hypothesis about origins of life, not a lab event that simply depends on aseptic technique.
D. Was supported by Pasteur's swan-necked flask experiments: Pasteur’s swan-neck flask experiments actually refuted the spontaneous-generation idea under the conditions tested, so they did not support abiogenesis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Mycoplasma: Mycoplasma (especially Mycoplasma pneumoniae) is the usual cause of atypical or “walking” pneumonia.
B. Corynebacterium: Corynebacterium diphtheriae causes diphtheria rather than walking pneumonia.
C. Streptococcus pneumonia: Streptococcus pneumoniae commonly causes typical lobar pneumonia, often more severe than walking pneumonia.
D. Aemophilus: (Likely intended Haemophilus) Haemophilus species can cause respiratory infections but are not the classic cause of walking pneumonia.
Correct Answer is A
Explanation
A. ribosome: The molecular machinery (ribosomes) is the site where mRNA is translated into polypeptides -the central site of protein synthesis.
B. plasmid: Plasmids are extra-chromosomal DNA elements carrying genes (e.g., for antibiotic resistance) and do not carry out protein synthesis.
C. cytoplasm: The cytoplasm is the cellular compartment where translation occurs (because ribosomes are located there), but the specific site of synthesis is the ribosome.
D. pilli: Pili (pilli) are external appendages involved in attachment and conjugation, not in making proteins.
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