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【多选题】
端粒的功能有哪些?
A.
可以保护染色体的末端不被降解。
B.
在一些物种中通用。
C.
任何细胞中的端粒在染色体复制是都会由端粒酶复制以保证末端不会变短。
D.
可以防止染色体末端连接。
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】有关端粒的叙述中，不正确的是（）。
A.
由重复序列组成
B.
在正常体细胞中，新合成DNA链的端粒不会变短
C.
其长度决定细胞分裂次数，被称为有丝分裂计时器
D.
肿瘤细胞可以“永生”，关键在于其可以表达端粒酶
【单选题】有如下事件过程：Private Sub Form_Load() Show Dim Arr() As Variant Arr = Array(1, 3, 5, 7, 9, 11, 13, 15) Call converse(Arr) For i = 0 To 7 Print arr(i); Next iEnd Sub 以上程序的功能是，通过调用Converse过程，将数组Arr中的元素逆序存放并输出...
A.
Private Sub converse(dim a() as Variant ) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
B.
Private Sub converse(dim a() as Variant) Dim T Dim J As Integer J = (LBound(A) + UBound(A)) / 2 For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
C.
Private Sub converse(a() As Variant) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
D.
Private Sub converse(a() As Variant) Dim T Dim J As Integer J = Int((LBound(A) + UBound(A)) / 2) For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub