百度试题 题目The nucleus contains most of the genes of the cell. What other cell organelles have additional DNA?相关知识点: 试题来源: 解析 mitochondria and chloroplast
In the past decade, evidence has accumulated that free Ca(2+) within the nucleus also plays an important messenger function. Here we review the mechanisms and effects of Ca(2+) signals within the nucleus. In particular, evidence is reviewed that the nucleus contains the machinery necessary for...
The NucleusNear the center of the cell is a roundish or oval-shaped nucleus. The nucleus controls the growth and division of the cell. It also contains the structures that transmit hereditary traits. Enclosed by a two-layered membrane, the nucleus contains a liquid called nucleoplasm as well ...
?The center, ___ nucleus, of an atom contains positively charged particles called protons.? A.and B.or C.but D.for? 正确答案:B解析:??B、这句话中的center和nucleus两词根据意思表达同位关系,使用or完成,译为“即” 5 单选(1分) 读者学会这些基本概念很重要,否则后面内容的讨论理解起来会有...
The structure that contains the genetic material in a cell is ___. A. nucleolus B. chromosome C. nucleus D. cytoplasm 相关知识点: 试题来源: 解析 C。本题考查细胞结构中遗传物质的储存位置。nucleus(细胞核)内含有遗传物质 DNA。nucleolus(核仁)与核糖体的形成有关。chromosome(染色体)是遗传物质的载...
A. cytoplasm B. nucleus C. cell membrane D. ribosome 相关知识点: 试题来源: 解析 B。解析:细胞质(cytoplasm)是细胞内的液体部分;细胞核(nucleus)含有细胞的遗传物质;细胞膜(cell membrane)控制物质进出细胞;核糖体(ribosome)是合成蛋白质的场所。
1. It contains 33 neutrons.2. Its nucleus has a relative charge of 27+.3. It has a different number of neutrons from the atoms of other isotopes of cobalt.(A) 1, 2 & 3 are correct.(B) 1 & 2 are correct.(C) 2 & 3 are correct....
Define nucleolus. nucleolus synonyms, nucleolus pronunciation, nucleolus translation, English dictionary definition of nucleolus. n. pl. nu·cle·o·li A small body in the nucleus of a cell that contains protein and RNA and is the site for the synthesis
the nucleus also contains one or two organelles-the nucleoli-that play a role in cell division.A pore-perforated sac called the nuclear envelope separates the nucleus and its contents from the cytoplasm.Small molecules can pass through the nuclear envelope ,but lager molecules such as mRNA and ...
Is the nucleus the sole source of DNA in a eukaryotic cell? The Nucleus: The nucleus is the largest organelle in eukaryotic cells. All cells in the human body (except red blood cells and platelets) have one or more nuclei. The nucleus is surrounded by the nuclear envelope (a dou...