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Concept explainers
To explain: What would happen if A-C, A-G pairs formed during
Introduction: According to Chargaff’s rule, DNA of all organisms should have an equal ratio (1:1 ratio) of its pyrimidine and purine bases. That is, the amount of guanine should be equaled to cytosine and the amount of adenine should be equaled to thymine. In order to achieve this, adenine always pairs with thymine and guanine with cytosine only. In case if any bases undergo pairing with a different base, it would seriously affect the accuracy of inheritance and the structure formed so would be energetically unstable.
To explain: Why inappropriate bases are often not incorporated in the DNA.
Introduction: According to Chargaff’s rule, DNA of all organisms should have an equal ratio (1:1 ratio) of its pyrimidine and purine bases. That is, the amount of guanine should be equaled to cytosine and the amount of adenine should be equaled to thymine. In order to achieve this, adenine always pairs with thymine and guanine with cytosine only. In case if any bases undergo pairing with a different base, it would seriously affect the accuracy of inheritance and the structure formed so would be energetically unstable.
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Chapter 5 Solutions
Essential Cell Biology 5e
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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