問題詳情
17. Which of the following statements about microRNAs is false?
(A)MicroRNAs are short RNA molecules.
(B)MicroRNAs are formed by cleavage of hairpin loops in a larger precursor.
(C) MicroRNAs have internal complementary base pairs, folding into cloverleaf patterns.
(D)MicroRNAs silence the expression of specific mRNAs.
(E)MicroRNAs are found in plants and animals.
(A)MicroRNAs are short RNA molecules.
(B)MicroRNAs are formed by cleavage of hairpin loops in a larger precursor.
(C) MicroRNAs have internal complementary base pairs, folding into cloverleaf patterns.
(D)MicroRNAs silence the expression of specific mRNAs.
(E)MicroRNAs are found in plants and animals.
參考答案
無參考答案
內容推薦
- Alternative RNA splicing(A)is a mechanism for increasing the rate of transcription.(B)is a mecha
- 【題組】(A) says(B) said(C) will say(D) would say
- If one nondisjunction event occurs in meiosis II during gametogenesis, what will be the result a
- Individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight. This occurs
- In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygo
- What was the most significant conclusion that Gregor Mendel drew from his experiments with pea p
- Which of the following statements about human sexual life cycle is false?(A)Gametes are the only
- Place the following events of mitosis in the correct order. I. Sister chromatids align on the met
- Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in con
- Which of the following statements about steroid receptors is false?(A)The receptors are localized
內容推薦
- Muscle cells differ from nerve cells mainly because they(A)contain different genes.(B)express di
- 2020 年 COVID-19 在全球肆虐，許多歐美經濟強國卻因醫療防護口罩欠缺，引發嚴重的社經安全問題。純就經濟因素考慮，這些國家口罩不足的現象，最適合以下哪種經濟地理概念來解釋？(A)工業慣
- What are prions?(A)mobile segments of DNA(B)tiny molecules of RNA that infect plants(C) misfolde
- The reason for using Taq polymerase for PCR is that(A)only minute amounts are needed for each cy
- Why might the cricket genome have 11 times more base pairs than that of fruit fly?(A)The two ins
- What characteristic of short tandem repeat DNA makes it useful for DNA fingerprinting?(A)The num
- What is the correct sequence of the following events, under the influence of natural selection?1
- In peas, a gene controls flower color such that R = purple and r = white. In an isolated pea pat
- The chloroplasts of all of the following are thought to be derived from ancestral red algae, exc
- The recessive allele that causes phenylketonuria (PKU) is harmful. What maintains the presence o
- Which eukaryotic kingdom is polyphyletic, and therefore unacceptable, based on cladistics?(A)Mon
- Plastids that are surrounded by more than two membranes are evidence of(A)origin of the plastids
- The following are all adaptations to life on land except(A)cuticles(B)tracheids(C)seeds(D)reduce
- How have fruits contributed to the success of angiosperms?(A)by nourishing the plants that make
- What do fungi and arthropods have in common?(A)Both groups have cell walls.(B)Both groups are co
- A plant seedling bends toward sunlight because(A)there is more auxin on the light side of the st
- Why is the amniotic egg considered an important evolutionary breakthrough?(A)It has a shell that
- The sodium-potassium pump of neurons pumps(A)Na+and K+out of the cell.(B)Na+and K+into the cell.
- Which of the following is an example of positive feedback control in homeostasis?(A)During the b
- You turn on the shower and check the water temperature with your hand. Your brain is able to mon
- What is the primary function of the transverse tubules?(A)Form cross-bridges between actin and m
- Which of the following are not important in chemical synapses?(A)gap junctions(B)secretory vesic
- Diving mammals like whales and seals experience frequent periods when they are not able to breat
- Which of the following is not a reason respiration in water is challenging?(A)Water is very dens
- Consider a tadpole becoming a toad. You would expect to find it changing its form of nitrogenous