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【多选题】
端粒的功能包括 :
A.
防止染色体末端被核酸酶降解，以维护染色体的完整性
B.
为线状染色体的末端复制提供基础
C.
保证染色体的准确联会配对
D.
与细胞衰老有关
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