The viewpoint at that time was that actin鈥攕hown to move freely between cytoplasm and nucleus鈥攚as a mere "thermodynamic wanderer," transiently occupying the nucleus. More recently, evidence has been mounting that actin's presence in the nucleus is not simply governed by the laws of ...
A eukaryotic cell (left) has membrane-enclosed DNA, which forms a structure called the nucleus (located at center of the eukaryotic cell; note the purple DNA enclosed in the pink nucleus). A typical eukaryotic cell also has additional membrane-bound organelles of varying shapes and sizes. In ...
If we distill the substantial literature on nuclear actin down to its essentials, we find four, recurring, and more-or-less independent, claims: (1) crosslinked networks of conventional actin filaments span the nucleus and help maintain its structure and organize its contents; (2) assembly or ...
Hemiballismus is a very rare motion disorder characterized by violent flinging movements of the arm on one side of the body. It usually results from damage to the subthalamic nucleus, although cell death in other parts of the basal ganglia can cause milder forms of its symptoms. Any neurologi...
All syllables must have a nucleus but not all syllables contain an onset and a coda. When pure vowels or monophthongs are pronounced, no vowel glides take place. According to the length or tenseness of the pronunciation, vowels can be divided into tense vs. lax orlong vs. short. Received...
well, unfortunately not. science has known for a long time that atoms mainly consist of empty space with electrons spinning around a central nucleus of protons and neutrons. and science has known for somewhat less time that these particles, which were once thought to be fundamental, are ...
DNA is coiled tightly to form structures calledchromosomes. Each chromosome contains a single DNA molecule, wrapped tightly around spool-like proteins called histones, which provide chromosomes their structure. Humans have 23 pairs of chromosomes, which are found inside each cell's nucleus, the contro...
That means the nucleus of an atom is effectively a big clump of positive charge. An electron is tiny compared to a proton, but it has exactly the same amount of charge. In fact, electrons have an opposite charge to protons (a charge of −1 or −0.00000000000000000016021892 C, to be ...
DNA is coiled tightly to form structures calledchromosomes. Each chromosome contains a single DNA molecule, wrapped tightly around spool-like proteins called histones, which provide chromosomes their structure. Humans have 23 pairs of chromosomes, which are found inside each cell's nucleus, the contro...
According to Chomsky, language is not a form of behaviour, it is an intricate system and a large part of language acquisition is the learning of this system. 【答案】rule-based 【解析】乔姆斯基认为,语言并不是一种行为,而是一套精密的以规则为基础的系统,语言习得主要是学习这一系统。 The theory...